According to the demand of disc solar power generation for surface shape detection of concentrator, an automatic surface detection method of disc solar concentrator based on non-diffractive moire fringe is proposed.The measuring principle of this method is described in detail in this paper.The ZEMAX software is used to simulate the optical system, and the non-diffractive moire fringes before and after the surface deformation are simulated.After binarization and fitting, 3D deformation of the concentrator can be obtained, and the shape surface of the condenser can be judged to meet the requirements of production and application.