In order to analyze the damage caused by brittleness meteoroid impaction, This paper use brittleness lava pill with hole to impact spacecraft typical whipple shield with high-velocity. Research show that on the slow velocity phase, impaction causes the front aluminum plate cut down, and when the velocity up to 2.778km/s, the black aluminum plate cut down, this velocity can approximated as critical velocity. The result of simulation is the same as those of tests.