diff --git a/three/index.d.ts b/three/index.d.ts
index b4b4995ee8..35149e1d8f 100644
--- a/three/index.d.ts
+++ b/three/index.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for three.js 0.83
 // Project: http://mrdoob.github.com/three.js/
-// Definitions by: Kon <http://phyzkit.net/>, Satoru Kimura <https://github.com/gyohk>, Florent Poujol <https://github.com/florentpoujol>, SereznoKot <https://github.com/SereznoKot>
+// Definitions by: Kon <http://phyzkit.net/>, Satoru Kimura <https://github.com/gyohk>, Florent Poujol <https://github.com/florentpoujol>, SereznoKot <https://github.com/SereznoKot>, HouChunlei <https://github.com/omni360>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 /// <reference path="detector.d.ts" />
@@ -20,6 +20,8 @@
 /// <reference path="three-transformcontrols.d.ts" />
 /// <reference path="three-vrcontrols.d.ts" />
 /// <reference path="three-vreffect.d.ts" />
+/// <reference path="three-ctmloader.d.ts" />
+/// <reference path="three-octree.d.ts" />
 
 declare namespace THREE {
     export const REVISION: string;
@@ -1996,7 +1998,7 @@ declare namespace THREE {
         mimeType: MimeType;
         path: string;
         responseType: string;
-        withCredentials: string        
+        withCredentials: string
 
         load(url: string, onLoad?: (responseText: string) => void, onProgress?: (request: ProgressEvent) => void, onError?:(event: ErrorEvent) => void): any;
         setMimeType(mimeType: MimeType): FileLoader;
@@ -3589,7 +3591,7 @@ declare namespace THREE {
         radius: number;
         phi: number;
         theta: number;
-        
+
         set(radius: number, phi: number, theta: number): Spherical;
         clone(): this;
         copy(other: this): this;
diff --git a/three/test/examples/ctm/ctmloader.ts b/three/test/examples/ctm/ctmloader.ts
new file mode 100644
index 0000000000..e35cffb6a4
--- /dev/null
+++ b/three/test/examples/ctm/ctmloader.ts
@@ -0,0 +1,7 @@
+/// <reference types="three" />
+
+let _ctmloader = new THREE.CTMLoader();
+_ctmloader.load('https://github.com/mrdoob/three.js/blob/master/examples/models/ctm/ben.ctm', (geo: any) => {
+    console.log(geo.position);
+});
+
diff --git a/three/test/examples/octree.ts b/three/test/examples/octree.ts
new file mode 100644
index 0000000000..de7de86ac7
--- /dev/null
+++ b/three/test/examples/octree.ts
@@ -0,0 +1,11 @@
+///<reference types="three"/>
+
+let _octree = new THREE.Octree({
+    underferred: false,
+    depthMax: Infinity,
+    objectsThreshold: 8,
+    overlapPct: 0.15,
+});
+
+console.log(_octree.getDepthEnd());
+
diff --git a/three/three-ctmloader.d.ts b/three/three-ctmloader.d.ts
new file mode 100644
index 0000000000..276f14b6a3
--- /dev/null
+++ b/three/three-ctmloader.d.ts
@@ -0,0 +1,36 @@
+// Type definitions for three.js (CTMLoader.js)
+// Project: https://github.com/mrdoob/three.js/blob/master/examples/js/loaders/ctm/CTMLoader.js
+// Definitions by: Hou Chunlei <https://github.com/omni360>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="three" />
+
+declare namespace THREE {
+  export class CTMLoader extends THREE.Loader {
+    constructor();
+
+    /**
+     * load multiple CTM parts defined in JSON.
+     * @param url(required)
+     * @param callback(required)
+     * @param parameters
+     */
+    loadParts(url: string, callback: () => any, parameters?: any): any;
+
+    /**
+     * Load CTMLoader compressed models
+     * @param url(required)
+     * @param callback(required)
+     * @param parameters
+     */
+    load(url: string, callback: () => any, parameters?: any): any;
+
+    /**
+     * create buffergeometry by ctm file.
+     * @param file(required)
+     * @param callback(required)
+     */
+    createModel(file: string, callback: () => any): any;
+
+  }
+}
diff --git a/three/three-octree.d.ts b/three/three-octree.d.ts
new file mode 100644
index 0000000000..3ce479e81f
--- /dev/null
+++ b/three/three-octree.d.ts
@@ -0,0 +1,42 @@
+// Type definitions for three.js (Octree.js)
+// Project: https://github.com/mrdoob/three.js/blob/master/examples/js/Octree.js
+// Definitions by: Hou Chunlei <https://github.com/omni360>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="three" />
+
+declare  namespace THREE {
+  export class Octree {
+    constructor(parameters?: any);
+
+    update(): void;
+
+    add(object: any, options?: any): any;
+
+    addDeferred(object: any, options?: any): any;
+
+    addObjectData(object: any, part: any): any;
+
+    remove(object: any): any;
+
+    extend(octree: Octree): any;
+
+    rebuild(): any;
+
+    updateObject(object: any): any;
+
+    search(position: THREE.Vector3, radius: number, organizeByObject: boolean, direction: THREE.Vector3): any;
+
+    setRoot(root: any): any;
+
+    getDepthEnd(): number;
+
+    getNodeCountEnd(): number;
+
+    getObjectCountEnd(): number;
+
+    toConsole(): any;
+
+
+  }
+}