Abstract:On one hand, position tracking device according to one claim directly reflects the performance and data transmission among system components、program algorithm and rationality of motor output speed; on the other hand, position tracking is a kind of basic structure and electromechanical control programming with higher requirements for equipment, especially highprecision movement. The design process is discussed for the structure of the mechanical part of the position tracking system experimental device, electrical control equipment and humancomputer interaction. The mechanical parts of the equipment were consisted of rail slider section, stepper motors, encoders and other components. Control section was Siemens S7200PLC Controller. eVIEW model ET070 7inch touch screen was used for the humancomputer interaction. Through programmable logical controller (PLC) control the stepping motors of masterslave movement, position tracking of the slider movement is implemented.