The virtual surgery system developed in recent years provides doctors with a virtual 3D environment and interactive operation platform to realistically simulate the entire process of clinical surgery. Compared with traditional surgical teaching, virtual surgery has the advantages of non-invasiveness, repeatability and specifyability. However, most research in this field is limited to the visualization phase of simulation. Due to the lack of tactile effects, the surgeries performed by doctors in the virtual environment are very different from the clinical environment. In order to solve the above problems, the force feedback concept is introduced into the virtual surgery system. Through real-time numerical calculation of the deformation process of surgical instruments and soft tissues, the deformation of the soft tissues and the force state of the instruments are simulated, and the force feedback output device is connected through the external device (Figure 1 ), allowing doctors to perceive the existence of feedback force during surgical operations and better achieve clinical surgical training effects.