In this paper, the narrow flanging skin composite part was studied and the technology of autoclave was adopted. According to analyzing the structure of the part, the result shows that selecting the Invar male frame tool to layup and curing the composite part, residual stress can be reduced because of the thermal capacity during the curing process as well as the deforming of the part. During the curing process, resin can sufficiently flow and soak so as to achieve the index of porosity. The porosity of the composite component is less than 1.5%. Based on the shape of the component, the result shows that designing the aid tool for layup and compaction, identifying the direction and technique of ply during layup, the outline of the flanging and the profile tolerance and the R shape can be guaranteed. Using the technology of the temperature compensation, we explore the effect of heating rate on the mechanical properties and resin content of the skin. The result shows that the best temperature rate is 0.5-1.5℃ /min before the glass-transition temperature (T g) of the prepreg, after T g until holding time the rate is 1.5-2.2℃ /min.