diff --git a/spine-ts/spine-construct3/src/aces.json b/spine-ts/spine-construct3/src/aces.json
index 81ac3b657..54fbb3bcd 100644
--- a/spine-ts/spine-construct3/src/aces.json
+++ b/spine-ts/spine-construct3/src/aces.json
@@ -207,10 +207,7 @@
           {
             "id": "units",
             "type": "combo",
-            "items": [
-              "seconds",
-              "ratio"
-            ]
+            "items": ["seconds", "ratio"]
           },
           {
             "id": "time",
@@ -221,6 +218,25 @@
             "type": "number"
           }
         ]
+      },
+      {
+        "id": "set-animation-mix",
+        "scriptName": "SetAnimationMix",
+        "highlight": false,
+        "params": [
+          {
+            "id": "from-name",
+            "type": "string"
+          },
+          {
+            "id": "to-name",
+            "type": "string"
+          },
+          {
+            "id": "duration",
+            "type": "number"
+          }
+        ]
       }
     ],
     "expressions": [
diff --git a/spine-ts/spine-construct3/src/c3runtime/actions.ts b/spine-ts/spine-construct3/src/c3runtime/actions.ts
index cf65d94ce..f69d77d3c 100644
--- a/spine-ts/spine-construct3/src/c3runtime/actions.ts
+++ b/spine-ts/spine-construct3/src/c3runtime/actions.ts
@@ -59,6 +59,10 @@ C3.Plugins.EsotericSoftware_SpineConstruct3.Acts =
 
 	SetAnimationTime (this: SDKInstanceClass, units: 0 | 1, time: number, track: number) {
 		this.setAnimationTime(units, time, track);
+	},
+
+	SetAnimationMix (this: SDKInstanceClass, fromName: string, toName: string, duration: number) {
+		this.setAnimationMix(fromName, toName, duration);
 	}
 
 };
diff --git a/spine-ts/spine-construct3/src/c3runtime/instance.ts b/spine-ts/spine-construct3/src/c3runtime/instance.ts
index 120aa6a61..ae924301d 100644
--- a/spine-ts/spine-construct3/src/c3runtime/instance.ts
+++ b/spine-ts/spine-construct3/src/c3runtime/instance.ts
@@ -249,6 +249,17 @@ class SpineC3Instance extends globalThis.ISDKWorldInstanceBase {
 		}
 	}
 
+	public setAnimationMix (fromName: string, toName: string, duration: number) {
+		const stateData = this.state?.data;
+		if (!stateData) return;
+
+		try {
+			stateData.setMix(fromName, toName, duration);
+		} catch (error) {
+			console.error('[Spine] setAnimationMix error:', error);
+		}
+	}
+
 	private _setSkin () {
 		const { skeleton } = this;
 		if (!skeleton) return;
diff --git a/spine-ts/spine-construct3/src/lang/en-US.json b/spine-ts/spine-construct3/src/lang/en-US.json
index 8c648f524..bfab7acf7 100644
--- a/spine-ts/spine-construct3/src/lang/en-US.json
+++ b/spine-ts/spine-construct3/src/lang/en-US.json
@@ -295,6 +295,25 @@
                 "desc": "Track index"
               }
             }
+          },
+          "set-animation-mix": {
+            "list-name": "Set animation mix",
+            "display-text": "Set animation mix from {0} to {1} duration {2}",
+            "description": "Set the blend/crossfade duration when transitioning from one animation to another",
+            "params": {
+              "from-name": {
+                "name": "From animation",
+                "desc": "Name of the animation to transition from"
+              },
+              "to-name": {
+                "name": "To animation",
+                "desc": "Name of the animation to transition to"
+              },
+              "duration": {
+                "name": "Duration",
+                "desc": "Blend duration in seconds"
+              }
+            }
           }
         },
         "expressions": {
diff --git a/spine-ts/spine-construct3/src/lang/zh-CN.json b/spine-ts/spine-construct3/src/lang/zh-CN.json
index eb025683e..9d8666aa7 100644
--- a/spine-ts/spine-construct3/src/lang/zh-CN.json
+++ b/spine-ts/spine-construct3/src/lang/zh-CN.json
@@ -297,6 +297,25 @@
             }
           }
         },
+        "set-animation-mix": {
+          "list-name": "设置动画混合",
+          "display-text": "设置从动画{0}到{1}的混合时长为{2}",
+          "description": "设置从一个动画过渡到另一个动画时的混合/淡入淡出时长",
+          "params": {
+            "from-name": {
+              "name": "起始动画",
+              "desc": "过渡起始的动画名称"
+            },
+            "to-name": {
+              "name": "目标动画",
+              "desc": "过渡目标的动画名称"
+            },
+            "duration": {
+              "name": "时长",
+              "desc": "混合时长（秒）"
+            }
+          }
+        },
         "expressions": {
           "double": {
             "description": "将数字翻倍。",