Abstract: In order to research the rock failure mechanism under explosive stress wave, base on the experiment of site blasting, dynamic photoelastic and dynamic moiré under column charge, through theoretical analysis, we propose the formula of blasting crater radius. At the same time, we simulate the blasting process and verify the theory by ANSYS/LS_DYNA. Through the simulation, we obtain that under same charge form and different dynamic tensile strength, the numerical value and theoretical value of blasting crater radius error is less than 10%; under same kind of rock and different charge length condition, the theoretical value of blasting crater radius error is less than 10%.