Aiming at the problem that the electric detonating device will generate induced current through electromagnetic coupling in a complex electromagnetic radiation environment, which will cause the electric detonating device to misfire, a non-contact induced current detection method based on phase lock technology is proposed. The current probe based on the tunnel magnetoresistance effect is used, and the output signal of the tunnel magnetoresistance probe is analyzed according to the principle of electromagnetic induction and phase-locking technology, so as to monitor the induced current in real time to avoid fire; and the non-contact based on phase-locking technology is obtained. Compared with the traditional infrared colorimetric temperature measurement method, the inductive current detection method has a faster response speed and higher measurement accuracy. A strong electromagnetic environment is built to simulate the working environment of the electric detonation device, and a non-contact current probe is used for experimental detection to realize the monitoring and detection of induced current and achieve the early warning effect. The experimental results show that the current detection accuracy of the method is ±0.1 Fluctuations in the mA range meet the detection requirements of the ignition current of the electric detonation device, and provide an effective solution for the induction current monitoring of the electric detonation device in a complex electromagnetic environment.