Handheld AC-DC magnetic field detector

The invention relates to the technical field of power maintenance equipment, and provides a handheld AC-DC magnetic field detector. The handheld AC-DC magnetic field detector comprises a package shelland a circuit board, wherein the circuit board is arranged in the package shell, a light-emitting diode and a power battery are arranged in the package shell, the light-emitting diode is used for indicating whether a magnetic field signal exists or not, the battery groove is used for installing a power supply, the circuit board comprises a singlechip microcomputer, a magnetic field induction sensor and the power supply, the magnetic field induction sensor is used for inducing and acquiring a magnetic field signal formed by a coil, the singlechip microcomputer is used for analyzing the magnetic field signal acquired by the magnetic field sensor, generating an LED lamp turn-on signal when that a corresponding magnetic field signal is induced by the magnetic field induction sensor is judgedand sending the generated