Automatic position adjustment cutter tooth

The utility model belongs to an automatic position adjustment cutter tooth which comprises a cylindrical tooth rod (1) and a tooth head (2), and is characterized in that the right end of the cylindrical tooth rod (1) is a position control square head (4); the cylindrical tooth rod (1) and the tooth head (2) are integrated; a trapezoid hard alloy blade (3) of which three edges are provided with cutting edges is welded in a slot of the tooth head (2); and an eccentric distance from the tip of the trapezoid hard alloy blade (3) to the axis of the cylindrical tooth rod (1) is e which is more than or equal to 10 to 30 mm. During use, the cylindrical tooth rod (1) is movably inserted into a circular hole of a tooth seat; when the tooth seat moves, the automatic position adjustment cutter tooth is driven to move; when the hard alloy blade (3) is stopped by an obstacle, the hard alloy blade (3) can be automatically turned to a cut position arranged on the rear edge for high-efficiency cutting; when the moving directi