The 2.5-m optical infrared telescope KDUST will be built in Antarctica by our country. In order to solve the problem of mirror frosting, the anti-frosting method by heating the indium tin oxide (ITO) film is proposed. With this method, the Antarctic Survey Telescope (AST) with sealed transmission structure has successfully been applied at the Antarctic Dome A. The anti-frosting feasibility of ITO thin films integrated in the reflecting film system, the preparation process and the surface shape variation of the anti-frosting reflector at different heating powers are discussed. The experimental results show that the ITO thin film integrated reflector has anti-frosting ability and little influence on the shape of the reflector surface, which can be applied to the large telescope system with reflection configuration in Antarctica.