Gap adjusting mechanism for scraper knife guide rail and angle position device of land leveller

The invention discloses a gap adjusting mechanism for a scraper knife guide rail and an angle position device of a land leveller. The two ends of the angle position device are each provided with a horizontally-inwards extending inner hole, an adjusting stud is contained in each inner hole in a matched manner and moves in the inner hole, and the end, extending to be located in the angle position device, of each adjustment stud is a conical head; the inner end of a threaded hole and a vertical steel ball raceway are through; a steel ball is contained in the steel ball raceway and moves in the steel ball raceway; a base plate is provided with a heel block which can extend into the steel ball raceway to be in contact with the steel ball; when the adjusting studs are screwed forwards, the conical heads at the front ends push the steel ball to move downwards to push the heel block and the base plate to move downwards, and a copper guide channel is extruded. According to the gap adjusting mechanism, gap adjusting of