Polymer diffusion welding is a new generation of diffusion welding machine, the conductive belt soft connection equipment, mainly composed of two parts, the host and the control, which can realize the diffusion welding between polymer materials. Polymer diffusion welding machine is widely used in electric power, chemical industry, smelting and other industries. It mainly produces busbar expansion joints and flexible connection conductive tape products that are urgently needed in the industry. It can realize diffusion welding between soft busbars, soft busbars and hard busbars and hard busbars. The equipment has reasonable structure, simple operation, safe use and energy saving.