The invention relates to a detection device, in particular to a pressure bearing detection device which comprises a first recovery channel, one side of the first recovery channel is communicated withan inner ring detection channel, the other side of the first recovery channel is provided with a discharge channel, the discharging channel is communicated with the inner ring detection channel, a first valve plate is hinged to the communicating part of the discharging channel and the inner ring detection channel; a detection block is arranged on the outer side of the inner ring detection channelin a sliding mode, the detection block is connected with a first supporting rod, a first magnet is arranged on the first supporting rod, a sliding rail is arranged on one side of the first supportingrod, a second supporting rod parallel to the first supporting rod is arranged on the sliding rail in a sliding mode, and a second magnet is connected to one side, facing the first supporting rod, of the second supporting rod, the magnetism of the second magnet is opposite to that of the first magnet, the other side of the second supporting rod is connected with a rope, and the rope is connected with the free end of the first valve plate. The problem that the bearing detection cannot be continuously carried out in the prior art is solved.