Abstract: In order to study the reasonable delay time of high stage throwing blasting, a similar material simulation experiment was conducted, the finite element software ANSYS was used to simulate the throwing blasting model with different millisecond delays. The test and calculation results show that:from the perspective of increasing maximum throwing distance and reducing boulder yield, when the interval between milliseconds is less than or equal to 2 ms, a portion of the energy in the rear row of holes is used to work on the broken pieces of the first row of holes, the pitch of the first row of holes is increased, and boulder yield of the first row of holes is also reduced; from the point of stressing superposition affection which is beneficial to the improvement of the three directions of x, y and z, the delay time of the second successive holes should be 1.27~2.04 ms. Since the geometric similarity ratio of the model size to the prototype size is set at 1:50,it is recommended that the extension time of the row of high-level throwing blasting in mines be 63.5~102.0 ms.