Abstract: With the development of aerospace remote sensing systems, high-precision medical imaging equipment, and other technologies, optical components, as the core parts of many high-end devices, are being increasingly applied. This paper focuses on the study of phosphate glass, simulating precision molding technology to analyze the relationship between parameters such as temperature and pressure and the molding quality. First, the shape of the lens is drawn, and the material parameters of the phosphate glass samples are obtained; then, three-dimensional modeling is performed, and the obtained parameters are imported into MSC.Marc for simulation; finally, the influence of process parameters on the molding quality of optical lenses is analyzed, and the obtained parameters are used to guide subsequent experiments. The results show that a heating rate of 0.75 ℃/s, a heating temperature of 560 ℃, and a pressing load of 1.1 MPa are relatively suitable. At this time, the formed lens has low residual stress according to finite element simulation and high molding quality, providing a certain reference for optimizing the process parameters of phosphate glass lenses and improving their manufacturing accuracy.