Automobile manufacturing leveling instrument and measuring method thereof

The invention discloses an automobile manufacturing leveling instrument and a measuring method thereof.The leveling instrument comprises a supporting mechanism, a bearing mechanism, a measuring mechanism and a driving motor, the supporting mechanism comprises supporting bottom beams, supporting frames, a cross beam and a mounting frame, the two supporting frames are fixed to the two supporting bottom beams respectively, and the tops of the supporting frames are connected with the cross beam; a mounting frame is fixed on the cross beam, and a driving motor is mounted and connected with the measuring mechanism; the bearing mechanism is arranged between the two supporting bottom beams and comprises a bearing plate, a fixing table and a driving shaft, the fixing table is fixed to the inner side faces of the two supporting bottom beams, a protruding block is arranged on the upper surface of the fixing table, the driving shaft is installed on the protruding block and fixedly connected with the bearing plate, a groo