Magnetic sensor, current detection device and current detection method

The invention discloses a magnetic sensor, a current detection device and a current detection method. The magnetic sensor comprises at least two sensing parts, and the directions of magnetic field components of the sensing parts in the first signal magnetic field are different; wherein the first signal magnetic field is generated by a to-be-measured current flowing through the conductor; the at least two sensing parts are correspondingly and electrically connected, and each sensing part comprises a half-bridge structure or a full-bridge structure; the sensing part performs resistance change on the first signal magnetic field through a half-bridge structure or a full-bridge structure to generate a sensing electric signal; the sum of sensing electric signals of the sensing parts of the magnetic sensor to a second magnetic field is zero, and the second magnetic field comprises a uniform magnetic field outside the conductor. According to the technical scheme provided by the embodiment of the invention, the interf