The work aims to prevent the diamond wire on the surface of heavy wire roller from being collided and squeezed in packaging, and solve the problems of complex packaging process, unreasonable space layout and low labor efficiency. Based on the three translation parallel mechanism, the vulnerable wire roller packaging production line was designed. First, the overall structure and function of the system were analyzed, and the key modules of the packaging line were designed by module design method. For 3P (4S) parallel robot, vector method was used to analyze the positive and negative position solutions, numerical method was used to solve its workspace, Lagrangian method was used to analyze the dynamics of the parallel robot, and the analysis results were verified in Adams and Matlab software. Finally, based on MCD and Simulink software, the vulnerable wire roller packaging production line including parallel robot module was jointly simulated. In joint simulation of NX MCD and Simulink, the motion of each part was continuous and the motion of the parallel manipulator module was stable and reached the desired position. The vulnerable wire roller packaging production line can work continuously, realizing the automatic packaging of the vulnerable wire roller packaging production line, and the production efficiency of packaging was improved from 2 min to 46 s. The vulnerable wire roller packaging line based on 3P (4S) mechanism can well solve the automation problem of the surface vulnerable wire roller packaging line, and can be applied to the wire roller packaging production line with high stability requirements, heavy load and complex packaging process.