In complex scenarios， the micro safety and arming device of initiating explosive device needs to have recoverable and anti-overload characteristics. Therefore， this study designed a metal-based electrothermal-driven micro safety and arming device based on laser processing. The finite element simulation was used to analyze the action characteristics of the nickel-based micro-electrothermal actuator. By adjusting the length and width of the hot arm and the cold arm of the double-arm U-shaped electrothermal actuator and the gap between the arms， the influence of them on the output displacement was explored. Through orthogonal experiments， the optimized ultra-fast laser processing parameters were obtained as follows： frequency 100 kHz， energy 113 μJ， and cutting speed 100 mm·s^-1， respectively. The ultra-fast pulse laser precision manufacturing of nickel-based electrothermal micro safety and arming device was realized. Finally， the performance verification platform of the safety and arming device was built， and the driving displacement and explosion-proof performance of the mechanism under different current excitations were verified. The results show that the driving displacement of the processed micro safety and arming device can reach 1084 μm under the excitation current of 8 A， and the encapsulated micro safety and arming device of initiating explosive device can effectively isolate the explosion in the explosive train.