Because of the difference between the laboratory testing conditions and the actual use conditions in the unloading impact pressure test of the hydraulic control check valve, the laboratory test data can not really reflect the dynamic characteristics of the hydraulic control check valve. In order to solve this problem, a set of test methods and devices for check valve unloading impact pressure similar to the actual working conditions were developed.The accumulator energy storage and controlled release technologies were used to generate appropriate unloading energy, the deformation energy storage of hydraulic support after loading was simulated to evaluate the dynamic characteristics of the hydraulic control check valve during unloading.The research results have a great significance to improve the quality of the check valve products.