Based on the Senamont method, a method of testing the two-dimensional (2D) distribution of phase delay is presented. The 2D distribution of phase delay of liquid crystal optical wedge and OA-LC-SLM is measured.The results we have measured is reported. The 2D phase distribution characteristic curve of the liquid crystal optical wedge is calculated by writting a program.The results show that the apex angle of the liquid crystal optical wedge adds when the testing voltage increasing. In the same way, the 2D phase contour map of the OA-LC-SLM is calculated. The 2D phase distribution of the OA-LC-SLM is analyzed.