Protective stop valve

The utility model relates to the technical field of stop valves, and discloses a protective stop valve which comprises a runner pipe, an upper protruding pipe is fixedly arranged at the position, close to the middle, of the upper end of the runner pipe in a sleeving mode, a connecting pipe is fixedly arranged at the upper end of the upper protruding pipe, and a rotating rod is fixedly arranged at the position, close to the middle, of the upper end of the connecting pipe in a sleeving mode. The lower end of the rotating rod is sleeved with a pressing mechanism in a threaded mode, the lower end of the pressing mechanism is sleeved with a connecting rod in a threaded mode, the pressing mechanism comprises a built-in sleeve, and a fixing plate is fixedly arranged on the inner wall of the built-in sleeve. According to the protection type stop valve, the downward pressing distance is limited through the limiting ring, the limiting ring is just pressed to the bottom after making contact with the upper end face of th