Doppler lidar was widely used for wind measurement. Compared with Fabry-Perot(F-P) interferometer and Fizeau interferometer, Mach-Zehnder(M-Z) interferometer have the advantages of high transmittance, wide spectral range, wide field of view and producing linear fringe. It can realize wide wind range detection and make up smaller detection range and nonlinear detection sensitivity of present technology. Wind measurement theory based on fringe imaging M-Z interferometer is analyzed. The parameters of interferometer system are optimized and then the system is designed by using a numerical simulation. The results show that the wind velocity retrieved agrees with theoretical wind velocity.