Abstract: With the wide application of high-speed and heavy-duty robot in automotive, metallurgy, logistics and other industries, people put forward higher requirements for the speed, acceleration and positioning accuracy of the robot. This article designs an experimental platform for four-axis heavy-duty mobile robot. First, the preliminary structural design of the handling robot is obtained by SolidWorks. The model is imported into Adams software for kinematic and dynamic simulation. Then the motor is selected and the initial model is optimized. Finally, the key parts are analyzed by Ansys finite element method to verify the rationality of the designed mechanism.