The detection and location of corona discharge are essential for the stability and reliability of electrical equipment in power grid. We proposed a novel method for measurement and location of multiple discharge points based on tunneling magnetoresistive sensors. A dual-axial tunneling magnetoresistive sensor device was designed and prepared to measure the magnetic field vector. The corona discharge current and magnetic field in free space were achieved by sensors’ responses to the external discharge magnetic field. The locations of multiple corona discharge points were calculated based on the location algorithm. The results indicated a relative error was approximately 10%

which was reasonable for the practical application. The measurement device and location algorithm fully utilizes the sensors’ merits and provides a promising solution for multiple corona discharge location.