Stretch forming is the basic method of aircraft sheet metal forming. Because the ultra-thick skin is easy to be tiled during the stretching process, the finite element model is established based on the analysis of the trajectory design and the resilience stress in this paper. Through the analysis of the super-thick double convex skin, the pretensioning–covering–pull-up loading trajectory is the most suitable, and can effectively guarantee the fitting degree of the parts. At the same time, combining with the finite element analysis of displacement control, pressure control and springback analysis set clamping spacing at 22t, clamping pressure at 7mm, the distribution of stress, amount of thinning and the springback amount of uniform distribution, which experiments that the parameters can effectively control tire degree, and achieve the design requirements.