The present invention relates to a self-destructive retractable safety needle. The main structure includes an injection needle including a needle cylinder and a push cylinder. The two ends of the needle cylinder respectively define a needle cylinder inlet and a needle cylinder outlet. The side of the syringe adjacent to the exit of the syringe defines a snap-off throat, a syringe combined body accommodating area is defined in the syringe, and the push tube is connected by a push tube sealing soft sleeve joint and a push tube piston part. Position a push tube sealing soft sleeve, the side of the syringe outlet part is provided with an integral function combination body, the integral function combination body is provided with a combination body liquid outlet and a combination body combination part that can be combined with a needle, and the syringe and the whole There is a latching device and a limit stop device between the function combination body, and a self-destruction device is arranged between the push cylinder and the overall function combination body. The self-destruction device includes a self-destruction joint component and a self-destruction positioning component. A needle tilting device and an airtight device are defined on the function combination body, so that the push cylinder and the overall function combination body can be combined through the self-destructing device to bring the needle into the syringe through the needle tilting device to prevent recurrence Advantages of using and improving safety.本發明為有關一種自毀拉縮安全針具，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，推筒及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針頭傾斜裝置及一氣密裝置，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，並經由針頭傾斜裝置達到防止再次使用及提高安全性之優勢。
