Flatness detection device for industrial plant floor construction

The utility model discloses a flatness detection device for industrial factory building floor construction, which comprises a case, the right side of the inner cavity of the case is fixedly connected with a motor, a drawing pen is placed between two arc-shaped clamping plates through a through hole, and then an electric push rod is started to push the arc-shaped clamping plates to clamp and fix the drawing pen. After clamping is completed, the drawing board is inserted into the machine box from the through hole, the pen point of the drawing pen makes contact with the drawing board, finally, the motor is started to drive the threaded rod to rotate, and due to limiting movement of the sliding groove and the sliding block, when the threaded rod rotates, the threaded sleeve can be driven to linearly move left and right; according to the utility model, the sliding seat, the sliding rod and the roller can be driven to move left and right when the roller moves, and the drawing pen can be driven to move left when the