diff --git a/Packages/packages-lock.json b/Packages/packages-lock.json
index 0f5278651..4262a6fb6 100644
--- a/Packages/packages-lock.json
+++ b/Packages/packages-lock.json
@@ -362,6 +362,12 @@
       },
       "url": "https://packages.unity.com"
     },
+    "com.utj.profilerreader": {
+      "version": "file:jp.unity3d.profilerreader",
+      "depth": 0,
+      "source": "embedded",
+      "dependencies": {}
+    },
     "com.unity.modules.ai": {
       "version": "1.0.0",
       "depth": 0,
diff --git a/Packages/src/Editor/ParticleBatchAssigner.cs b/Packages/src/Editor/ParticleBatchAssigner.cs
new file mode 100644
index 000000000..1045c01d6
--- /dev/null
+++ b/Packages/src/Editor/ParticleBatchAssigner.cs
@@ -0,0 +1,249 @@
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using UnityEngine;
+
+#if UNITY_2021_2_OR_NEWER
+using UnityEditor.SceneManagement;
+#elif UNITY_2018_3_OR_NEWER
+using UnityEditor.Experimental.SceneManagement;
+#endif
+
+namespace Coffee.UIExtensions
+{
+    /// <summary>
+    /// Editor window that batch-assigns multiple ParticleSystem GameObjects/effects
+    /// into a UIParticle's "Particles" list in one click.
+    /// </summary>
+    public class ParticleBatchAssigner : EditorWindow
+    {
+        private UIParticle _target;
+        private readonly List<Object> _sources = new List<Object>();
+        private Vector2 _scroll;
+        private bool _expandChildren;
+
+        [MenuItem("Tools/UIParticle/Batch Particle Assigner")]
+        private static void Open()
+        {
+            var win = GetWindow<ParticleBatchAssigner>("Particle Batch");
+            win.minSize = new Vector2(340, 460);
+        }
+
+        private void OnGUI()
+        {
+            EditorGUILayout.Space();
+            EditorGUILayout.LabelField("UIParticle 批量特效配置", EditorStyles.boldLabel);
+            EditorGUILayout.HelpBox(
+                "选中多个特效 GameObject（或 ParticleSystem），拖到下方源区；选好目标 UIParticle 后一键批量添加。",
+                MessageType.None);
+
+            // ---- 目标 ----
+            using (new EditorGUILayout.HorizontalScope())
+            {
+                _target = (UIParticle)EditorGUILayout.ObjectField(
+                    "目标 UIParticle", _target, typeof(UIParticle), true);
+                if (GUILayout.Button("用选中", GUILayout.Width(60)))
+                {
+                    _target = Selection.objects
+                        .Select(o => (o as UIParticle) ?? (o as GameObject)?.GetComponent<UIParticle>())
+                        .FirstOrDefault(u => u != null);
+                }
+            }
+
+            EditorGUILayout.Space();
+
+            // ---- 特效源 ----
+            EditorGUILayout.LabelField("特效源", EditorStyles.boldLabel);
+            _expandChildren = EditorGUILayout.ToggleLeft(
+                "展开子 ParticleSystem（默认关：只取根，与原 Inspector 拖动一致）", _expandChildren);
+            DrawDropArea();
+            DrawSourceList();
+
+            EditorGUILayout.Space();
+
+            // ---- 操作 ----
+            using (new EditorGUI.DisabledGroupScope(_target == null || _sources.Count == 0))
+            {
+                if (GUILayout.Button("批量添加到 UIParticle", GUILayout.Height(32)))
+                {
+                    ApplyToTarget(true);
+                }
+
+                using (new EditorGUILayout.HorizontalScope())
+                {
+                    if (GUILayout.Button("替换目标列表"))
+                    {
+                        ApplyToTarget(false);
+                    }
+
+                    if (GUILayout.Button("清空源"))
+                    {
+                        _sources.Clear();
+                        GUI.changed = true;
+                    }
+                }
+            }
+
+            if (_target == null)
+            {
+                EditorGUILayout.HelpBox("请先指定一个目标 UIParticle。", MessageType.Info);
+            }
+        }
+
+        private void DrawDropArea()
+        {
+            var rect = GUILayoutUtility.GetRect(0, 44, GUILayout.ExpandWidth(true));
+            var style = new GUIStyle(GUI.skin.box)
+            {
+                alignment = TextAnchor.MiddleCenter,
+                normal = { textColor = new Color(0.6f, 0.6f, 0.6f) }
+            };
+            GUI.Box(rect, "把多个特效 GameObject / ParticleSystem 拖到这里", style);
+
+            var evt = Event.current;
+            if (rect.Contains(evt.mousePosition)
+                && (evt.type == EventType.DragUpdated || evt.type == EventType.DragPerform))
+            {
+                var refs = DragAndDrop.objectReferences;
+                var valid = refs.Any(IsValidSource);
+                DragAndDrop.visualMode = valid
+                    ? DragAndDropVisualMode.Copy
+                    : DragAndDropVisualMode.Rejected;
+                if (evt.type == EventType.DragPerform && valid)
+                {
+                    DragAndDrop.AcceptDrag();
+                    foreach (var o in refs)
+                    {
+                        AddSource(o);
+                    }
+
+                    evt.Use();
+                }
+            }
+        }
+
+        private void DrawSourceList()
+        {
+            var expanded = GetParticleSystems(_sources, _expandChildren).Count();
+            EditorGUILayout.LabelField(
+                $"源 {_sources.Count} 个 → 展开出 {expanded} 个 ParticleSystem",
+                EditorStyles.miniLabel);
+
+            _scroll = EditorGUILayout.BeginScrollView(_scroll, GUILayout.MinHeight(90));
+            for (var i = _sources.Count - 1; i >= 0; i--)
+            {
+                using (new EditorGUILayout.HorizontalScope())
+                {
+                    EditorGUILayout.ObjectField(_sources[i], typeof(Object), true);
+                    if (GUILayout.Button("×", GUILayout.Width(24)))
+                    {
+                        _sources.RemoveAt(i);
+                    }
+                }
+            }
+
+            EditorGUILayout.EndScrollView();
+        }
+
+        private void AddSource(Object o)
+        {
+            if (o == null || !IsValidSource(o)) return;
+            if (_sources.Contains(o)) return;
+            _sources.Add(o);
+        }
+
+        private static bool IsValidSource(Object o)
+        {
+            return o is ParticleSystem || o is GameObject;
+        }
+
+        private static IEnumerable<ParticleSystem> GetParticleSystems(IEnumerable<Object> sources, bool expandChildren)
+        {
+            var seen = new HashSet<ParticleSystem>();
+            foreach (var o in sources)
+            {
+                if (o == null) continue;
+                if (o is ParticleSystem ps)
+                {
+                    if (seen.Add(ps)) yield return ps;
+                }
+                else if (o is GameObject go)
+                {
+                    if (expandChildren)
+                    {
+                        // 展开所有子 ParticleSystem（含禁用/嵌套）：用于一个 GameObject 含多个并联粒子的复杂特效
+                        foreach (var c in go.GetComponentsInChildren<ParticleSystem>(true))
+                        {
+                            if (seen.Add(c)) yield return c;
+                        }
+                    }
+                    else
+                    {
+                        // 默认：只取根节点上的 ParticleSystem，与「拖 GameObject 到 Inspector 列表」行为完全一致
+                        var rootPs = go.GetComponent<ParticleSystem>();
+                        if (rootPs != null && seen.Add(rootPs)) yield return rootPs;
+                    }
+                }
+            }
+        }
+
+        private void ApplyToTarget(bool append)
+        {
+            if (_target == null) return;
+
+            Undo.RecordObject(_target, append ? "Batch add particles" : "Replace particles");
+
+            var so = new SerializedObject(_target);
+            var sp = so.FindProperty("m_Particles");
+            so.Update();
+
+            if (!append)
+            {
+                sp.ClearArray();
+            }
+
+            // 现有引用去重
+            var existing = new HashSet<Object>();
+            for (var i = 0; i < sp.arraySize; i++)
+            {
+                var r = sp.GetArrayElementAtIndex(i).objectReferenceValue;
+                if (r != null) existing.Add(r);
+            }
+
+            foreach (var ps in GetParticleSystems(_sources, _expandChildren))
+            {
+                if (!existing.Add(ps)) continue;
+                sp.InsertArrayElementAtIndex(sp.arraySize);
+                sp.GetArrayElementAtIndex(sp.arraySize - 1).objectReferenceValue = ps;
+            }
+
+            so.ApplyModifiedProperties();
+
+            // 刷新渲染器（不会清空列表）
+            _target.RefreshParticles(_target.particles);
+
+            // Prefab 阶段保存
+            SaveIfInPrefabStage(_target);
+
+            EditorGUIUtility.PingObject(_target);
+        }
+
+        private static void SaveIfInPrefabStage(Object obj)
+        {
+#if UNITY_2018_3_OR_NEWER
+            var go = (obj as Component)?.gameObject;
+            if (go == null) return;
+            var stage = PrefabStageUtility.GetCurrentPrefabStage();
+            if (stage != null && stage.scene.isLoaded && go.scene == stage.scene)
+            {
+#if UNITY_2020_1_OR_NEWER
+                var assetPath = stage.assetPath;
+#else
+                var assetPath = stage.prefabAssetPath;
+#endif
+                PrefabUtility.SaveAsPrefabAsset(stage.prefabContentsRoot, assetPath);
+            }
+#endif
+        }
+    }
+}
diff --git a/Packages/src/Editor/ParticleBatchAssigner.cs.meta b/Packages/src/Editor/ParticleBatchAssigner.cs.meta
new file mode 100644
index 000000000..a2c72bdc9
--- /dev/null
+++ b/Packages/src/Editor/ParticleBatchAssigner.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 1f7e81e1435d7274796a28b07c081f75
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Packages/src/Editor/ParticleScale3DResetter.cs b/Packages/src/Editor/ParticleScale3DResetter.cs
new file mode 100644
index 000000000..a17913314
--- /dev/null
+++ b/Packages/src/Editor/ParticleScale3DResetter.cs
@@ -0,0 +1,57 @@
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace Coffee.UIExtensions
+{
+    /// <summary>
+    /// One-click reset of UIParticle.m_Scale3D to (1,1,1).
+    /// The C# default was changed from (10,10,10) to (1,1,1), but already-serialized
+    /// UIParticle assets/scene objects keep their old (10,10,10) value. This menu fixes them.
+    /// </summary>
+    public static class ParticleScale3DResetter
+    {
+        [MenuItem("Tools/UIParticle/Reset Scale3D to 1")]
+        private static void ResetScale3D()
+        {
+            var done = new HashSet<Object>();
+            var count = 0;
+
+            // Loaded scene objects (including inactive).
+            foreach (var uip in Object.FindObjectsOfType<UIParticle>(true))
+            {
+                if (ResetOne(uip)) { done.Add(uip); count++; }
+            }
+
+            // Selected prefab assets in the Project window.
+            foreach (var obj in Selection.objects)
+            {
+                var path = AssetDatabase.GetAssetPath(obj);
+                if (string.IsNullOrEmpty(path)) continue;
+                var asset = AssetDatabase.LoadAssetAtPath<GameObject>(path);
+                if (asset == null) continue;
+                foreach (var uip in asset.GetComponentsInChildren<UIParticle>(true))
+                {
+                    if (!done.Contains(uip) && ResetOne(uip)) { done.Add(uip); count++; }
+                }
+            }
+
+            AssetDatabase.SaveAssets();
+            Debug.Log($"[UIParticle] Reset Scale3D to (1,1,1) on {count} UIParticle(s).");
+        }
+
+        private static bool ResetOne(Object uip)
+        {
+            var so = new SerializedObject(uip);
+            so.Update();
+            var sp = so.FindProperty("m_Scale3D");
+            if (sp == null) return false;
+            if (sp.vector3Value == new Vector3(1, 1, 1)) return false;
+
+            sp.vector3Value = new Vector3(1, 1, 1);
+            so.ApplyModifiedProperties();
+            EditorUtility.SetDirty(uip);
+            return true;
+        }
+    }
+}
diff --git a/Packages/src/Editor/ParticleScale3DResetter.cs.meta b/Packages/src/Editor/ParticleScale3DResetter.cs.meta
new file mode 100644
index 000000000..3b2c44cf9
--- /dev/null
+++ b/Packages/src/Editor/ParticleScale3DResetter.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 3670b336d10c266418ac9ad2d6747479
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Packages/src/Runtime/UIParticle.cs b/Packages/src/Runtime/UIParticle.cs
index 3f3ffa6a5..cd600ba7e 100644
--- a/Packages/src/Runtime/UIParticle.cs
+++ b/Packages/src/Runtime/UIParticle.cs
@@ -64,7 +64,7 @@ namespace Coffee.UIExtensions
 
         [Tooltip("Scale the rendering particles. When the `3D` toggle is enabled, 3D scale (x, y, z) is supported.")]
         [SerializeField]
-        private Vector3 m_Scale3D = new Vector3(10, 10, 10);
+        private Vector3 m_Scale3D = new Vector3(1, 1, 1);
 
         [Tooltip("If you want to update material properties (e.g. _MainTex_ST, _Color) in AnimationClip, " +
                  "use this to mark as animatable.")]
diff --git a/Packages/src/Runtime/UIParticleRenderer.cs b/Packages/src/Runtime/UIParticleRenderer.cs
index 814c137ab..8f18eb7a1 100644
--- a/Packages/src/Runtime/UIParticleRenderer.cs
+++ b/Packages/src/Runtime/UIParticleRenderer.cs
@@ -417,10 +417,11 @@ namespace Coffee.UIExtensions
                 }
                 else
                 {
-                    var diff = _particleSystem.transform.position - _parent.transform.position;
+                    // Relative mode: place the ParticleSystem at its true local offset from the
+                    // UIParticle. No (scale-1) amplification, so the on-UI position matches the
+                    // in-scene relative position regardless of scale3D.
                     s_CombineInstances[0].transform =
                         canvasRenderer.transform.worldToLocalMatrix
-                        * Matrix4x4.Translate(diff.GetScaled(scale - Vector3.one))
                         * GetWorldMatrix(psPos, scale);
                 }