Disclosed is a safety protection apparatus for an injection syringe. The safety protection apparatus comprises a locking ring and a protective cover, wherein the protective cover can be positioned on the injection syringe by the locking ring fixed on the injection cylinder, or be moved forwards to shield a needle body of the injection syringe, and the protective cover which shields the needle body cannot be withdrawn due to the restriction of the locking ring.一種注射針筒安全保護裝置,該保護裝置包括一鎖定環和一保護套,該保護套透過固定在注射筒上的該鎖定環而可定位在注射筒上或者往前移動遮蔽該注射筒的針體,且遮蔽該針體之保護套因該鎖定環之限制而無法再退回。10‧‧‧注射針筒11‧‧‧注射筒12‧‧‧推桿13‧‧‧針體14‧‧‧前端部15‧‧‧止擋緣30‧‧‧鎖定環50‧‧‧保護套51‧‧‧凸緣52‧‧‧推拔面53‧‧‧細肋條
