Abstract: To study the dynamic tensile properties and energy dissipation of granite after thermal treatment,the split Hopkinson pressure bar (SHPB) device was used to conduct three groups of dynamic splitting tensile tests on granite samples after heat treatment at room temperature(25 ℃) and 200-800 ℃,respectively. The relationships between temperature,impact speed and dynamic tensile strength and energy of granite were discussed. The results show that when the impact speed is constant,the tensile strength of the sample decreases as the temperature increases. At a certain temperature,the dynamic tensile strength of the specimen increases gradually with strain rate. The dissipation energy of the specimen under the splitting load can be categorized into four stages:compaction stage,elastic stage,yield damage stage,and complete failure stage. It has been observed that as the temperature increases,less energy is required to cause specimen failure. Furthermore,the range of dissipated energy reduction and energy consumption density decrease gradually with increasing temperature. The failure characteristics of the sample exhibit a high sensitivity to temperature variations. Specifically,as the temperature increases,the degree of sample fragmentation intensifies,the symmetry of the resulting fragments diminishes,the wedge effect becomes more pronounced,and the overall plasticity of the sample is enhanced.