Based on the conventional data, satellite image, Doppler radar echo an d wind profiler information, a consecutive convection process in the Pudong Int ernat ional Airport on June 22, 2006 is analyzed. The results show that the first seve re convection event in the process was a local heat convection, the second sever e co nvection event was a squall line triggered by cold front, and the third severe c onve ction event was caused by mesoscale depression circulation. During the time earl ier before the squa ll line occurs， an apparent vertical wind shear was shown by the wind profiler information of the Pudong International Airport. It was of early warning signif icance.