Mining sealing ring assembling device

The utility model belongs to the technical field of assembling devices, and discloses a mining sealing ring assembling device which comprises a circular plate, a connecting plate is movably connected to the middle of the circular plate, a first fixing body is fixedly installed at the right end of the connecting plate, a supporting column is fixedly installed on the bottom face of the circular plate, and a square plate is fixedly installed on the bottom face of the supporting column. The first belt group drives the first connecting column and the third connecting column to move in the direction away from the third belt group, and the connecting plate drives the first fixing body and the second fixing body to move reversely, so that the sealing ring body deforms, and the position of the middle hole is enlarged; the to-be-installed part is placed at the middle adjusting position of the sealing ring body, then the motor is started to rotate reversely, the first fixing body and the second fixing body return to the