Abstract: By using the multichannel standard data of TRMM, the precipitation three-dimensional structure of the torrential rain caused by Southwest China Vortex in Sichuan basin is studied. The results show that the infrared and microwave brightness temperature characteristics can proof the precipitation characteristics of Southwest China Vortex. The precipitation caused by Southwest China Vortex (SCV) belongs to mesoscale precipitation system, the contribution of stratiform precipitation is more than 90% and there is a clear bright band structure. The extensive precipitation areas are concluding a rain belt and some independent convective precipitation clouds, presenting the structural characteristic of convective precipitation surrounded by large-scale stratiform precipitation. The cloud top of convective precipitations can reach 17km, the local maximum precipitation rate appears at 2~5km height. The bulge part of precipitation is the single independent convective cloud with a precipitation tower shape from the three-dimensional map.