Mining belt conveyor with belt deviation protection function and using method

The invention discloses a mining belt conveyor with a belt deviation protection function and a using method. The mining belt conveyor comprises a back plate, and the top of the back plate is installed on a longitudinal beam through two U-shaped screws; the U-shaped screw is used for adjusting the angle of the back plate relative to the longitudinal beam by changing the relative position of the U-shaped screw and the longitudinal beam; the back plate is detachably connected with a mining deviation sensor, two sides of a main body of the mining deviation sensor are respectively provided with a waist-shaped groove, and the back plate is also correspondingly provided with two first long grooves; the mining deviation sensor is used for detachably connecting the kidney-shaped groove and the first long groove on the same side through a fastener. And the fastener is used for installing the mining deviation sensor at different positions of the first long groove so as to realize the adjustment of the relative position