By using a high temperature split Hopkinson pressure bar apparatus composed of a traditionalΦ100 mm SHPB and a high-temperature device,a dynamic compression test of granite chosen from Shaanxi Qinling mountain under high temperature and dynamic loading was conducted.The varying laws of its peak stress,peak strain and elastic modulus were studied.It was demonstrated that during 25 ℃ to 600 ℃,temperature has a little effect on its peak stress;but its peak stress drops rapidly within the temperature range of 800 ℃to 1000 ℃;the possible critical temperature exists within the temperature range of 600℃to 800℃;the peak strain increases gradually with increase in temperature,and the elastic modulus generally presents decreasing trend;in general,its peak stress and peak strain reveal significant strain rate hardening effect at high temperature.%采用高温装置对传统的大直径Φ100 mm SHPB试验设备进行改造，利用该试验系统对采自陕西秦岭山区的花岗岩进行不同高温与冲击荷载共同作用下的动态压缩试验，考察了高温下花岗岩的峰值应力、峰值应变、弹性模量的变化规律。试验结果表明：在25℃～600℃时，高温作用对花岗岩峰值应力的影响不大；800℃～1000℃时，花岗岩峰值应力受高温影响明显，迅速下降；600℃～800℃有可能存在花岗岩内部结构突变的临界温度；随着温度的升高，峰值应变呈现逐渐增加的趋势，而弹性模量离散性较大，大体上呈现逐渐减小的趋势；从总体规律上来说，高温下花岗岩的峰值应力、峰值应变仍然表现出显著的应变率硬化效应。
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