The antifouling performance of lens surface is one of the important functions of spectacle lens products. This paper introduced the testing principles and methods of oily pen method and contact angle method, which are commonly used to measure the antifouling performance of lens surface. The advantages and disadvantages of the two methods were verified through practice, and the application prospect of oily pen method was prospected in order to provide reference for the inspection and detection of antifouling performance of lens surface.