Abstract: In order to study the dynamic changes of temperature during the ignition process of the ignition resistor and solve the matching problem of the energy storage capacitor-ignition resistor system, this paper measures the voltage-current changes and temperature changes of the ignition resistor under different capacitor discharge voltages through electrothermal experiments, infrared temperature measurement and numerical simulation methods. Combined with the surface conditions of the unmelted samples, Determine the critical fuse voltage of the ignition resistor, and obtain the law of the electrical characteristic curve and the temperature variation law of the ignition resistor. The results show that under the same voltage, the bridge membrane linear type has the shortest melting time. Under the same resistance value, the melting time and heating time of the bridge film ignition resistor are shorter than those of the bridge wire type, and the maximum temperature it can reach is also higher. During the power-on process of the bridge wire type and bridge film type S-shaped ignition resistors, heat is prone to accumulate at the corners and phase change occurs first.