Abstract: In order to solve the problem that the pillar of hydraulic support is easy to be damaged by the impact load of stope, the impact model of the pillar hydraulic system is established by using AMESim simulation software on the basis of establishing the pillar model, the large flow safety valve model and the weight hammer model of the pillar hydraulic system. According to the national test requirements for the coal mine hydraulic support, the impact model of the pillar hydraulic system is established. The impact test was carried out on the column, and the impact response characteristics of the hydraulic system of the column were studied. The peak emulsified hydraulic pressure and its variation curve were obtained. The conclusion is that under the impact load, the strength of the secondary cylinder block of the hydraulic support column needs to be strengthened, and the response time of the hydraulic support column system to the peak pressure has a certain relationship with the impact quality and the drop height of the weight hammer, which provides an important basis for the design of liquid supply system and hydraulic support in coal mining face.