Due to the nonlinearity of the digital projection and acquisition system, usually it is necessary for traditional approaches to eliminate high-order harmonics of the captured fringe patterns by using lowpass or bandpass filters and obtain fundamental component. A novel filtering method-post filtering for digital fringe pattern profilometry is presented based on generalized analysis model, it can reduce the influence from the nonlinear distortion of the fringe patterns and improve the accuracy of digital fringe pattern profilometry. The principle of fringe pattern profilometry and generalized analysis model are recited,a derivative process of the post filtering method is analyzed. Simulation and experimental results show that fast and precise digital three-dimensional reconstruction can be achieved by the post filtering method.