The above results are based on the analysis of primary factors of accidents. On this basis, this study reviews the existing research results and conducts a statistical analysis of the safety accidents that have occurred in China's construction projects in recent years. On the basis of existing experiences and methods, the improved analytic hierarchy process (IAHP) - technique for order preference by similarity to ideal solution (TOPSIS) safety evaluation model is designed by applying IAHP and TOPSIS methods to establish a safety production system in construction projects, and to conduct scientific and reasonable evaluations and case analyses to verify the effectiveness.