Stop valve suitable for ocean crude oil conveying pipeline

The invention discloses a cut-off valve suitable for an ocean crude oil conveying pipeline, and relates to the technical field of valves, the cut-off valve comprises a valve body comprising a front end valve body and a rear end valve body which are connected through a first snap bolt and provided with a damping oil cavity; the inner sleeve is arranged in the valve body and is provided with a valve clack cavity; the push rod is axially arranged in the damping oil cavity, a spring is arranged at the rear end of the push rod, and the push rod is provided with a damping hole and a push rod groove; the valve clacks are arranged in the valve clack cavities and comprise valve clack rotating shafts, valve clack limiting shafts and valve clack protruding heads, and the valve clack protruding heads are clamped in the push rod grooves and can be pushed by the push rod to turn around the valve clack rotating shafts to be closed. The invention has the following beneficial effects: when the pulling force of the oil conveyi