In order to verify the accuracy of the simulation results of ProCAST in the solidification process of modified B explosives, the solidification simulation of modified B explosives was verified. A heat exchange model was established, and test conditions and simulation boundary conditions of modified B explosives were set. The solidification process of modified B explosives was numerically simulated by ProCAST software. By simulating the solidification states in different moments, the fitting results of 2D curves in the solidification interface at different moments were compared, and the accuracy of ProCAST in simulating the solidification process of modified B explosives. The results show that the ProCAST program can accurately simulate the solidification of modified B explosives.