Using satellite images, observational data and the 6-hour-inteval reanalysis data with 1°×1° resolution from NCEP, five spring rainstorm processes in Guizhou Province under the background of Dian-Qian quasi-stationary front from 2003 to 2006 are analysed. The results show: In the setting of quasi-stationary front, the spring rainstorm in Guizhou Province is impacted together with the upper and low jet stream, upper trough, cold air and the quasi-stationary front. The rich water vapor is transported from the Bay of Bengal and Beibu Gulf to Guizhou province by low level jet stream, and the convective available potential energy is accumulated continuously. The acceleration of high jet stream strengthens the large-scale ascending motion with divergence in high level and convergence in low level, and drives the cold air southward via the positive circulation below the jet stream, then makes the quasi-stationary front active and frontogenesis, which is the trigger mechanism of the rainstorm processes. The frontogenesis phenomenon shows that the acceleration of high level jet stream results in the frontogenesis in the polar front in the mid-upper troposphere and the formation of the positive circulation in the middle troposphere. The latter strengthens the horizontal deformation and vertical motion and then enhances the frontogenesis. The horizontal deformation and vertical motion impact the rainstorm directly: The range of the horizontal deformation is in proportion to the rainfall intensity, and the convective cloud generating near the quasi-stationary moves along the direction of the inclined item related to vertical motion. Quasi-stationary front is close to spring rainstorm in Guizhou province. The heavy rainfall area is distributed mainly southward one latitude zone from the quasi-stationary front. The acceleration of high jet stream, the intensity of the moisture convergence around the cold front and the region of high-energy tongue have an indicative function to the extent and intensity of heavy rainfall. Based on above frontogenesis mechanism, a physical model about spring rainstorm in Guizhou province induced by the quasi-stationary front is epurated.