Valve leaking stoppage device

A valve leaking stoppage device comprises a support (1), a screw (2), a standby cap (3), a female adapter (4), a positioning unit (5), a pressing plate (6) and an oil-proof rubber plate (7). The valve leaking stoppage device is characterized in that the support (1) is of a U-shaped platy structure, the two ends of the support (1) are provided with crescent openings, the upper side and the lower side of each crescent opening are each provided with a through hole (B), a slide way (C) is arranged in the middle of the support (1), the female adapter (4) is arranged in the slide way (C), and the screw (2) provided with the standby cap (3) is connected with a threaded hole (D) of the female adapter (4) and abuts against the positioning unit (5) on the pressing plate (6) so that the oil-proof rubber plate (7) can be tightly pressed. The valve leaking stoppage device is suitable for production processes of crude oil gathering and transportation pipe networks or gathering and transportation pump stations or other places of oil fields, maintenance is conducted while production is not stopped when an online valve body is pricked and leaks, operation is safe, production and operation of gathering and transportation pipe networks or gathering and transportation pump stations or other places of oil fields are guaranteed, and normal production of crude oil of oil wells of oil fields is maintained.