With respect to the explosive charge unsafety caused by high-speed earth penetrator，the penetration test was carried out with subscale projectiles，and the test projectiles were recovered to check the variations of appearance and density of explosive charges. Baffle test was also performed to test the thickness variations of critical baffle and the effects of the impact loads on the damaged to explosive charge in the process of penetration were studied further. Results show that the damages to the explosive charge at different positions are different (it is more serious in the front and rear section compared with that in the middle section)，and the damages increase with the increasing of penetration velocity and the shock sensitivity is improved remarkably.