The production line has successively completed the assembly of all parts of lock ( including inclined tongue, tongue bracket, knob, shell, inclined tongue baffle, spring, panel, decorative panel and other parts.) tested the pressure and torque parameters of the assembled products, screened the defective products found in the assembly and testing process, and finally output the qualified products and automatically packed them. This production line realizes automatic production of locks, reduce labor cost and improves efficiency.