In this paper,resistance brazing was used to conduct the lap test of 1060 aluminum plate and T2 copper plate,and the design was compounded.The electrode head and the process gasket with large impedance are used to achieve thermal compensation,which can realize the welding of copper and aluminum dissimilar materials at a lower current level,set different welding process parameters,and use real-time sensing technology to solder the resistance.The temperature,electrode voltage and electrode current signals of the dynamic process are collected in real time,and the range of the welding process parameters is initially determined based on the temperature,and then the dynamic resistance curve reflecting the welding process is obtained by calculating and processing the detection signal.The dynamic resistance of the welding process is studied.The experimental results show that the changes of welding current and welding time lead to different welding energy,and different dynamic resistance changes occur in the process of resistance brazing,and different welding joint quality characteristics are formed,wh ich provides the possibility for non-destructive evaluation of welding joint quality.