A safety indwelling needle includes a body having a shaft hole axially extending therein, the body extending radially from a shunt tube communicating with the shaft hole, and a front end of the body is further provided with a needle seat a soft needle segment extending toward the rear, and an end plug is inserted behind the shaft hole； and a puncture device comprising a grip rod, the front end of the grip rod axially receiving a puncture needle, the grip rod being behind the puncture needle The end is provided with a connecting rod chamber, and the puncture needle penetrates the end plug and passes through the shaft hole, and a needle of the front end of the puncture needle protrudes from the front end of the needle segment； the grip rod is slidably sleeved a positioning mechanism is disposed in a sleeve, and an outer peripheral surface of the front portion of the grip and an inner peripheral surface of the rear portion of the sleeve are oppositely disposed； when the grip is pulled away from the needle and the body, the grip is The needle sleeve slides until the positioning mechanism forms a snap, so that the needle sleeve completely covers the puncture needle and the needle to provide safety in use.一種安全留置針，其包括一本體，其內軸向開設一軸孔，該本體徑向伸出與該軸孔相連通的一分流管，且該本體前端另設有一針座，該針座前端軸向延伸的一軟質針段，而該軸孔後方則套入一端塞；以及一穿刺裝置，其包括一握桿，該握桿前端軸向接裝一穿刺針，該握桿在該穿刺針後端設有相連通的一桿室，且該穿刺針刺入該端塞並通過該軸孔，並將該穿刺針前端的一針頭由該針段前端伸出；該握桿可滑動地套設於一針套內，並在該握桿前段的外周面和該針套後段的內周面相對地設有一定位機構；當該握桿從該針段及該本體抽離時，該握桿在該針套內滑動，直到該定位機構形成扣接，使該針套將該穿刺針及該針頭予以完全包覆，以提供使用上的安全性。
