Abstract:With the acceleration of coal mining and the deepening of mine depth, deep geotechnical stress will cause damage to the floor of soft rock roadway and bring great safety risks. The crawler floor roof bolter is an anchor drilling equipment for the roadway floor support in recent years. The optimization design and research of its hydraulic system were made. Based on AMESim software, the rotary loop, walking circuit and drilling loop were simulated and analyzed, and the pressure and flow dynamics curves of each loop were obtained. The results show that the designed hydraulic system can effectively guarantee the synchronous performance of the two walking motors, and it has the advantages of wide speed regulation, small fluctuation and so on. It provides some reference for the improvement of the existing hydraulic system of crawler floor roof bolter.