The virtual surgery training system is an important application of virtual reality technology in the medical domain. The paper introduces some domestic and foreign virtual surgery systems and their applications in the field of medical teaching, surgical navigation, surgery training, tele-surgery, etc. It studies the construction of Web-based integrated virtual surgery training system for pediatric heart disease. The results prove that the virtual surgery system realizes the preliminary design goals and has positive significance in enhancing clinical surgery skills and guiding the surgeries.