Well head safety prevents spouting anti -theft device

The utility model relates to a well head safety prevents spouting anti -theft device. Its technical scheme is: be equipped with the leading wheel on the polished rod, be equipped with first backstop portion in the lower part of body, be equipped with second backstop portion on the upper portion of body, right side at block structure is equipped with drive arrangement, be equipped with the theftproof plug on drive arrangement's right side, the elasticity pull rod passes through theftproof bolted connection with the bracing piece, at the fixed theftproof backplate that is equipped with in the nut left side, the nut sheath is equipped with at bolt assembly left end cover, be equipped with the theftproof sheath in the left side of nut sheath, be equipped with the locking piece carrier in the theftproof sheath, be equipped with the locking piece in the locking piece carrier, be equipped with the pressure spring between locking piece and theftproof sheath inner wall, be equipped with the jump ring fixing with locki