Abstract:A motorcycle brake dragging moment test control system was designed based on using PLC as the core controller and touch panel as upper computer. Detail design processes for the mechanical structure, working principle of the system, the flow and control program of PLC and configuration program were analyzed. The system realizes the accurate test of dragging moment of the motorcycle brake and control of the quality of assembly line working, at the same time, provides effective testing data for the development of new products, and makes the product technical parameters reached higher requirements.