Abstract: Monorail crane has obvious performance advantages in underground coal mine operations. In order to design an advanced support system with high flexibility and fast response, based on the principle of monorail crane operation, the transportation function is weakened, and a working platform is added to realize the function of supporting the anchoring of the excavation； Hydraulic system for supporting is designed; Supporting principle is introduced; AMESim, a hydraulic modeling simulation software, is used to establish a simplified hydraulic circuit. The main parameters are set according to the actual working conditions; the hydraulic pressure value of the hydraulic cylinder and the displacement change curve are obtained. The curve characteristics are analyzed and the hydraulic system’s feasibility is verified.