The utility model relates to oil-water well down-hole operation tools, in particular to a trigger type oil tube blanking plug. The upper end of a lower end portion of the trigger type oil tube blanking plug is connected with a center rod. The upper end of a cava rail is connected with a center pipe. The center rod is installed inside the center pipe. The upper end of the center rod is connected with a trigger rod. Sealing rubber is installed between the lower end portion and the cava rail. A cava tooth is installed on the cava rail and a tooth hanging body. An expansion seal spring is installed outside the center rod in a sleeved mode. The upper end of the expansion seal spring is abutted against a step position of the center rod. The lower end of the expansion seal spring is abutted against an inner step of the center pipe. The tooth hanging body is installed on the center pipe in a sleeved mode and fixed through a safe locating pin. A steel ball is installed inside a groove of the center pipe and the tooth hanging body. A groove capable of containing the steel ball is formed in the center rod. A trigger cover is installed on the outer side of the center pipe in a sleeved mode. A cava spring is installed inside the trigger cover. According to the trigger type oil tube blanking plug, input in the well can be achieved through the manner of a freely falling body and the manner of steel wire winch delivery, the blanking plug is accurate in plugging input position and reliable in plugging effect through trigger working.