Safe syringe needle

The invention provides a safe syringe needle, which includes a connecting pipe and a needle, wherein the connecting pipe is fixedly connected with the needle; a protective sleeve is slideably connected with the connecting pipe and the needle; the protective sleeve is provided with a transfixion side wall and a chute installed along axial direction of the protective sleeve; a handle is connected with the connecting pipe through the chute. The two ends of the chute is provided with a front block and a rear block. When the protective sleeve is slided to a limit position, the needle is totally covered, and when the protective sleeve is slided to another limit position, the needle is totally exposed. By using the structure, it is convenient to slide the protective sleeve to totally cover the needle after injection and users are prevented from being hurt by edge tools. The safe syringe needle is small in structure and volume without influence on injection angle, and is easy in operation. 本发明提供种安全注射针头，包括连接管和针头，连接管与针