The present invention relates to a self-destructing pull-shrink safety protective needle. The main structure includes an injection needle including a syringe and a push cylinder. A syringe inlet and a syringe outlet are respectively defined at two ends of the syringe. A side of the syringe adjacent to the exit of the syringe is defined with a snap-off opening, a syringe combination body receiving area is defined in the syringe, and a push tube is sealed by a push tube to seal the soft sleeve joint portion and a push tube piston portion. Combined with the positioning, a push tube sealing soft sleeve is provided at the side of the syringe outlet with an integrated functional combination. The integrated functional combination is provided with a combined liquid outlet and a combined combination with a needle. A snap-off device and a limit stop device are provided between the integrated function combination body, and a self-destruct device is provided between the push cylinder and the integrated function combination body. The self-destruction device includes a self-destructed joint component and a self-destructed positioning Component, an airtight device is defined on the overall function combination, so that the push cylinder and the overall function combination can be combined via a self-destructing device, so that the needle can be retracted into the syringe to prevent re-use and improve safety .本新型為有關一種自毀拉縮安全防護針具，主要結構包括一包含有一針筒及一推筒之注射針具，針筒之兩端處分別界定有一針筒入口部及一針筒出口部，針筒鄰近針筒出口部之側處界定有一卡脫隘口部，針筒內界定有一針筒結合體容置區，推筒上係經由一推筒密封軟套結合部及一推筒活塞部結合定位一推筒密封軟套，針筒出口部之側處設有一整體功能結合體，整體功能結合體上設有一結合體出液口及一可結合針頭之結合體結合部，而針筒及整體功能結合體之間設有一卡脫裝置及一限位擋止裝置，該推筒及該整體功能結合體之間設有一自毀裝置，自毀裝置包含有一自毀接合組件及一自毀定位組件，整體功能結合體上界定有一氣密裝置，如此即可將推筒及整體功能結合體經由自毀裝置結合，以將針頭拉縮帶入針筒內達到防止再次使用及提高安全性之優勢。
