Aim at the undersirable situations occurring during the forming process of plastic hot-air riveting, with the purpose of improving the quality of the rivet head, this paper explores the optimal parameter settings of hot air riveting process to improve the quality of rivet head. By changing the heating time, heating temperature and cylinder pressure of the hot air riveting equipment, the orthogonal test of hot air rivet head quality considering the interaction is performed. The multi-index evaluation process of plastic hot air rivet head is established. TOPSIS method is used to sort out the results of multiple evaluation indexes as the response variables of orthogonal test, and the results of orthogonal test are analyzed by range analysis and variance analysis. The results show that the comprehensive score of the quality of the plastic hot air rivet head is the highest, which is 0.835 7 when the heating time of the hot air riveting equipment is 3 s, heating temperature is 190 ℃ and cylinder pressure is 0.7 MPa.