diff --git a/spine-ts/spine-construct3/src/aces.json b/spine-ts/spine-construct3/src/aces.json
index 52be3e76c..3374fd055 100644
--- a/spine-ts/spine-construct3/src/aces.json
+++ b/spine-ts/spine-construct3/src/aces.json
@@ -763,6 +763,18 @@
           }
         ]
       },
+      {
+        "id": "bone-length",
+        "expressionName": "BoneLength",
+        "highlight": false,
+        "returnType": "number",
+        "params": [
+          {
+            "id": "bone-name",
+            "type": "string"
+          }
+        ]
+      },
       {
         "id": "bone-world-x",
         "expressionName": "BoneWorldX",
diff --git a/spine-ts/spine-construct3/src/c3runtime/expressions.ts b/spine-ts/spine-construct3/src/c3runtime/expressions.ts
index 5e08c87d5..e11a5f1cc 100644
--- a/spine-ts/spine-construct3/src/c3runtime/expressions.ts
+++ b/spine-ts/spine-construct3/src/c3runtime/expressions.ts
@@ -76,6 +76,14 @@ C3.Plugins.EsotericSoftware_SpineConstruct3.Exps =
 		return this.getBoneRotation(boneName);
 	},
 
+	BoneLength (this: SpineC3Instance, boneName: string) {
+		const { skeleton } = this;
+		if (!skeleton) return 0;
+		const bone = skeleton.findBone(boneName);
+		if (!bone) return 0;
+		return bone.data.length;
+	},
+
 	BoneWorldX (this: SpineC3Instance, boneName: string) {
 		return this.getBoneWorldX(boneName);
 	},
diff --git a/spine-ts/spine-construct3/src/lang/en-US.json b/spine-ts/spine-construct3/src/lang/en-US.json
index 435c0132d..5bbb0d3c5 100644
--- a/spine-ts/spine-construct3/src/lang/en-US.json
+++ b/spine-ts/spine-construct3/src/lang/en-US.json
@@ -851,6 +851,16 @@
               }
             }
           },
+          "bone-length": {
+            "description": "Get the length of a bone.",
+            "translated-name": "BoneLength",
+            "params": {
+              "bone-name": {
+                "name": "Bone name",
+                "desc": "Name of the bone"
+              }
+            }
+          },
           "bone-world-x": {
             "description": "Get the C3 world X position of a bone.",
             "translated-name": "BoneWorldX",
diff --git a/spine-ts/spine-construct3/src/lang/zh-CN.json b/spine-ts/spine-construct3/src/lang/zh-CN.json
index 69ce34b01..a83c2bdd9 100644
--- a/spine-ts/spine-construct3/src/lang/zh-CN.json
+++ b/spine-ts/spine-construct3/src/lang/zh-CN.json
@@ -851,6 +851,16 @@
               }
             }
           },
+          "bone-length": {
+            "description": "获取骨骼的长度。",
+            "translated-name": "BoneLength",
+            "params": {
+              "bone-name": {
+                "name": "骨骼名称",
+                "desc": "骨骼的名称"
+              }
+            }
+          },
           "bone-world-x": {
             "description": "获取骨骼的C3世界X位置。",
             "translated-name": "BoneWorldX",