Functional Description: This software mainly helps medical workers plan for patients with orthopaedic tumors before surgery, and develop surgical plans for tumor resection. 1) The user can draw a curve to mark the path of the tumor resection, and 2) the user can mark the location of the tumor resection by drawing a plane. 3) The user can create a guide post to mark the orientation and direction of the needle during surgery. The design of the surgical plan allows the companys internal personnel to further design the tumor surgical cutting guide.