Abstract: In order to optimize the theoretical calculation method of overpressure peak value of booster explosive firstly, the overpressure peak values of hemispherical and cylindrical passivated RDX and TATB booster explosive with different densities were studied by air explosion test, and the numerical simulation was carried out on the basis of the test. The results show that the increase of density / charge is not enough to offset the energy release loss caused by the incomplete reaction of explosive due to the fact that the actual detonation process of TATB booster explosive fails to achieve the ideal reaction condition, so that the overpressure peak value does not increase but decreases under the condition of high density charge. With the increase of density / charge, the peak value of shock wave overpressure of RDX booster increases gradually. And then, combined with the experiment and the numerical simulation verified by reliability, a variety of existing empirical formulas were selected as the overpressure peak prediction model. Through comparative study, it is found that the existing empirical formulas are not accurate enough to evaluate the overpressure peak of booster explosive. Evaluating the RDX booster explosive, the theoretical calculation results generally show higher, and the estimation results of TATB booster there are larger error. Finally, an optimized empirical formula that can better describe the peak overpressure of two types of booster explosive was fitted. Through error calculation and verification, the formula can effectively predict the peak overpressure of two types of booster explosive and evaluate its power.