This paper designs a multi-axis manipulator control system for automatic sampling analyzer. The system is mainly composed of microcontroller, three-axis manipulator, positioning sensor, liquid crystal display, communication module and other parts.The microcontroller can control the movement of the manipulator by receiving the instruction of the host computer.The manipulator module adopts a control strategy of multi-axis cooperative movement, which can correct the control parameters in real time and optimize the motion trajectory to ensure the precision, stability and speed of the manipulator's moving process.For some community hospitals and other basic medical institutions, considering its economic, demand and other factors, it is of great significance to develop a small automatic sample adding analyzer with high precision, high stability and low cost. After the experimental test of the system, the multi-axis manipulator control system designed in this paper can meet the requirements of equipment testing in small and medium-sized hospitals.