Abstract: The welding quality of contact elements of low-voltage electrical appliances is related to the service life and performance of equipment. In order to optimize the resistance welding process, the welding process of contact elements of CJX2-25 low-voltage AC contactor are put forward. Firstly, the electrode design is carried out. According to the characteristics of different materials of the component, tungsten-copper alloy (CuW90) is selected on the substrate side, and embedded electrodes are used on the contact side, giving consideration to heat dissipation and heat balance. Comparing resistance spot welding with resistance brazing, the better resistance spot welding process is selected in terms of joint strength. The welding parameters were optimized by orthogonal test, and the optimal parameters were determined as welding current 5.5 kA, welding time 15 ms and welding pressure 3.5 MPa. Finally, welding quality control is carried out from tooling positioning, electrode inspection and other links. The performance test and analysis show that the average shear strength of welded joints reaches 256 MPa, which is much higher than the industry standard. The average contact resistance is 31 μΩ, and it is 34 μΩ after 1000 on-off times. The electrical properties are excellent, which shows that this process can form high-quality welded joints.