It is difficult to realize automatic molding due to the complex structural characteristics of the composite heat protection structure for the symmetric lifting body, such as the alternation of positive and negative curvatures and the existence of large curvature mutation areas. This paper innovatively presents the automatic profiling paving technology of the composite heat protection structure, adopts the self-developed automatic profiling paving head to carry out the molding test, and analyzes the positions of the nodes that need to be pressurized during the molding process by combining with the developability of the profiling surfaces. The finite element model of automatic profiling paving molding was established to analyze the contact area and contact stress between the vacuum suction cup and the mold at the curvature change position. The paving and molding experiments were carried out, the quality of paving and molding was analyzed, and the vacuum suction cup array scheme was optimized to improve the quality of paving and molding. The results show that by using the self-developed automatic profiling paving device and the optimized vacuum suction cup combination scheme, defects such as indentations on both sides of the suction cups, vacuum pores, and bridging in the paving molding samples are significantly reduced, approaching the ideal paving state.