To thoroughly investigate the motion characteristics of front-end furnace robots under extreme and complex working conditions involving high temperature, high pressure, and overlapping intense mechanical and thermal shocks, it is necessary to establish an accurate mechanical-hydraulic co-simulation model. Based on the operational requirements of front-end furnace robots, the overall structure and hydraulic system were designed. Using the ADAMS and AMEsim software platforms, a mechanical-hydraulic co-simulation model for the robot was developed to analyze the variations in load, flow rate, rotational speed, and output force of hydraulic motors and cylinders. The validity of the co-simulation was confirmed through field applications, offering theoretical references for subsequent engineering designs of smelting furnace robots and the development of impact-operating robots with hydraulic drives under ultra-intense shock loads.