According to the needs of the actual working conditions of the hydraulic hammer in engineering construction, the flow distribution system of the flexible feedback hydraulic hammer was studied theoretically. A set of experimental prototype of the flexible feedback hydraulic hammer controlled by electrohydraulic joint control was designed; the experimental test platform of the hydraulic hammer was built, and the feasibility and working condition experiments were carried out. The experimental results show that the design is feasible, and the crushing performance meets the requirements. By using this system, the impact energy and impact frequency of the new hydraulic hammer can be changed in real time, and the impact performance parameters under actual working conditions can be collected and analyzed.