Abstract: Based on 16 kinds of cloud microphysical parameterization schemes in the mesoscale WRF v3.8.1 model, a comparative experiment of a rainstorm event caused by the plateau shear line within August 26^th and 27^th, 2014 was conducted. The results show that the WRF model successfully simulates this rainstorm process and that the NSSL 2−moment scheme works best in the simulation of this process in general. However, in the simulation of various levels of precipitation, different cloud microphysical parameterization schemes have their own advantages, and the NSSL 2−moment scheme has the best simulation results concerning the heavy rain and the rainstorm. In the main rainfall area, the simulated peak of hourly precipitation lags behind the observations in all kinds of schemes, showing a stronger emergent trend, while the accumulative precipitation simulated by the NSSL 2−moment+CCN scheme is closest to the observations in this area. Simulated results of hydrometeors reveal that snow particle content increases with the rise of precipitation, and the snow particles can not only help the development of convective activities through the release of latent heat during the condensation process, but also promote precipitation through the melting process. As for warm cloud precipitation, there is no significant difference in the content of rain water particles which can reach the ground in each scheme.