Abstract: The effect of dynamic load disturbance is an important factor affecting the stability of surrounding rock during the remining process of relict coal. In order to investigate the effects of dynamic load disturbance on the shear strength, shear mechanical parameters, surface strain field and acoustic emission characteristic parameters of sandstone under different pre-static load levels, acoustic emission monitoring system, DIC strain monitoring system and self-developed dynamic and static load multi-field coupling test system were used to carry out variable-angle shear tests on sandstone under coupled dynamic and static loading. The results show that under the combined loading, the shear strength and cohesion of sandstone firstly increase and then decrease with the increase of preload level, while the internal friction angle and the maximum principal strain difference before and after disturbance firstly decrease and then increase, and both of them reach extrema at preload level of 75% shear strength. Overall, the evolution of cumulative acoustic emission energy and the cumulative ringing counts appear to be six phases under the combined loading:The first stable growth period,the first surge period,the calm period,the second surge period,the second stable growth period,and the third surge period. In the perturbation phase,the acoustic emission signal activity level shows a tendency of decreasing and then increasing with the increase of the pre-static loading level, with the extremum appearing at the pre-static loading level of 60% shear strength. The research results can provide some certain reference for the ground control of disturbed surrounding rock under combined static and dynamic loading.