The electromagnetic induction method is obtained by Faraday's law of electromagnetic induction. The change of the magnetic flux is determined by the induction electromotive force of the coil, so as to obtain the strength of the electromagnetic field. The single turn coil is used as the measuring element of this method. The stability and anti-interference ability of the measuring system are improved by good grounding and shielding measures. First, calculate the current value, and then compare the results measured by the magnetic field with the theoretical value obtained by the galvanometer. If the error is very small, the feasibility of the scheme can be verified [6]. The main problem of this scheme is shielding. As long as there are good shielding measures, electromagnetic induction method can be used as an effective method to measure the intensity of magnetic field.