Combined with BUP sheet metal forming machine and ARAMIS 3D optical material strain measurement system, the DC53D forming limit curve was measured, and the lowest strain of DC53D forming limit is 36.4% by experiment. Then, the stamping of back door angle plate was analyzed by the grid strain analysis technique with the maximum major strain 31.2% and the maximum thickness thinning 25%, and major strain variation curve on the section line was obtained as well. Contrasting the major strain of the stamping part with the forming limit curve of DC53D, it is found that the most serious deformation of automobile parts is drawing deformation in the back angle plate around the door. Therefore, stamping sheet DC53D is of good forming performance. The stamping part major strain at the lowest point of the forming limit curve is 24.3%. Furthermore, the analysis results of grid strain provide the basis for the failure analysis of the forming part, and the adjustment and modification of the die.