The utility model relates to a frizing device is prevented spouting by oil well, include: take out oil pipe, scrape the factice ring, prevent spouting the nipple joint and trigger the ring, the center of spouting the nipple joint with triggering the ring all is equipped with the through -hole preventing, prevent spouting the nipple joint diameter and take out inner diameter of the oil pipe and the same and fix on taking out oil pipe's inner wall, it is located the lower part of preventing spouting the nipple joint to trigger the ring, be equipped with the active pull rod on triggering the ring, the active pull rod is located the through -hole outside, active pull rod one end is fixed on triggering the ring, the other end is connected with the movable rail alive way of preventing spouting the nipple joint embedded, the end of saying at the movable rail that lives still is equipped with the trigger, the controller is continuous outward with taking out oil pipe for the trigger, controller and inflation pump connected, pump one end with scrape factice intra -annular intercommunication. The utility model discloses rational in infrastructure, convenient to use scurries on having prevented that oil gas from flowing and arouses and the well head overflow prevent the emergence of blowout effectively.