The invention discloses a level calibrator which comprises a
surface plate, a base, a motor, a synchronous belt, a
rope, a bearing, a locker, a take-up reel and a storage frame. The
surface plate is mounted above the base; the motor, two gears, a connecting shaft and the synchronous belt are mounted in the base; the connecting shaft is mounted on the motor, the connecting shaft is connected to onegear, the two gears are driven by the synchronous belt; the bearing, the take-up reel, an auxiliary column, a fixed head and the locker are mounted on the
surface plate; the bearing is located behindthe surface plate, the storage frame is mounted below the bearing, the storage frame is located at the bottom of the surface plate, the take-up reel is mounted in the storage frame, the locker is mounted at the front end of the surface plate, the auxiliary column is arranged below the locker, and the auxiliary column is located at the bottom of the surface plate. The level calibrator calibrates aplane by being stretched by the
rope, so that the calibrating demand can be met quickly and simply and the calibrating precision is very high.