Wellhead flow device of annular anti-theft valve group

The invention provides a wellhead flow device of an annular anti-theft valve group. Relates to the technical field of oilfield oil extraction. A horizontally-arranged base is welded to the vertical pipe, an anti-theft cover is arranged on the base, a pipeline beside the oil outlet pipe is connected with a hand-operated direction valve, the hand-operated direction valve is connected with a double-acting oil cylinder, the double-acting oil cylinder is fixedly connected to the base, and a plunger is vertically and fixedly connected to the inner wall of the anti-theft cover. An anti-theft door is installed on one side face of the anti-theft cover. The combination valve has the following beneficial effects that the double-acting oil cylinder is arranged, the hydraulic pressure of the oil outlet pipe is used as driving force to lift the anti-theft cover, and the anti-theft cover and the base are opened and closed to achieve the operation and anti-theft functions of the combination valve; lawbreakers cannot open the