Anti-theft valve

The utility model relates to a valve with a theft protection installation, which comprises a valve body, a valve core and a valve core connecting bar. The utility model is characterized in that the valve body is provided with a closed outer cylinder of the connecting bar along the axial direction of the valve core connecting bar, a groove is radially arranged on the upper side near the top portion of the connecting bar on the inner wall of the outer cylinder, and a stop head main body is arranged inside the space of the upper portion of the groove. The stop head main body comprises a centre hole and two to eight through-holes, each hole is inserted with a center bayonet catch and a bayonet catch separately. The lower portion of the bayonet catch is provided with a plain pin, and the outer cover is provided with a locking plate of which the outer periphery is inserting connected with a round groove at the center portion of the closed outer cylinder, and further the lower portion of the center bayonet catch is fixed with a connecting plate which is connected with the rotary shaft via the around locking plates. Another stop head main body is replaced by a lock pin of which the lower portion is horizontally connected with a locking plate, and the locking plate is inserting connected with the groove of the inner wall of the outer cylinder. Compared with the prior theft protection technique of valves, the utility model is simple and reasonable in structure, and convenient for operation and use, further the theft protection performance is increased. The utility model has a totally internally-arranged enclosed structure which prevents dust and rain, thereby the utility model is applicable to be used in fields particularly.