Abstract: To solve test machine and environmental vibration caused by brittle specimen test, a shock reduction method of using elastic supports paralleling with the test piece to adjust the stiffness of the overall specimen system was presented and serial of comparing tests with different additional supported stiffness were carried out in this paper. Results show that it can significantly reduce the shock and vibration caused by the damage of brittle specimens. This method is relatively easy to be implemented and the cost is low, and it can be used for implementation of brittle test and upgrading of large structure test machine.