Aiming at the difficulty of fault location of mechanical stamping machine,a low power consumption fault detection system for mechanical stamping machine is designed.The ultra-low power STM32L051C8T6 microcontroller is used as the main control,and the multi-node networking of the sensor is completed based on LoRa technology.The temperature and vibration signals of the punch of the punching machine are collected and transmitted to the gateway system based on Android embedded platform for analysis and storage.The system functions are reduced by reducing the clock,low-power peripherals,and low-power internal resources.The experiment results show that the stable transmission distance of the system can reach 300 meters,the packet loss rate is lower than 1.2%,the temperature detection accuracy is higher than ±0.5 ℃,the vibration accuracy is higher than ±0.1g,and the average working current is 1.17 mA in the workshop environment where the metal equipment is densely distributed.The system has strong real-time performance,strong anti-interference ability,low cost,low power consumption,and can effectively satisfy the impact machine real-time condition monitoring requirements.