Using Moldflow software as an analysis platform , taking an electrical plate of over- wire as a specific case, the plastic part structure was analyzed firstly, then the plastic part was formed and analyzed using cold and hot flow channel technology. Comparing the CAE parameters of the two technologies, then get the results. The application of thermal channel technology to injecttion mold design can use lower filling melt temperature, reduce the risk of melt polymer decomposition significantly, and the application of thermal channel technology can reduce the possibility of cavitation and fusion marks due to gas distress and temperature difference. At the same time, the cooling time can be reduced and the efficiency of die production can be greatly improved. The analysis results provide theoretical support for the wide application of hot channel technology in injection mold design.