By the multifunctional testing device for rock fragmentation,the breaking tests of granite under static loading,impact loading and combined static and dynamic loading were carried out.The test results show that the breaking effects of rock can be improved greatly under combined static and dynamic loading,combined static and dynamic loading is more effective than impact loading and static loading in the breaking depth and volume of rock,the specific energy consumption of rock fragmentation is different for different combined dynamic and static loading,reasonable ratio of dynamic loading to static loading may make the specific energy consumption least and breakong effect optimal.