The invention relates to a needle free positive pressure joint, which mainly comprises a sleeve, a connecting pipe, an elastic unit and a piston, wherein the sleeve is connected with the connecting pipe, while the piston and the elastic unit are located inside the sleeve and the connecting pipe, and the piston can be displaced in the sleeve and the connecting pipe. When the delivery pipe is not connected, the elastic unit will push the piston outward and close the needle free positive pressure joint, while when the delivery pipe is connected, the delivery pipe will press the piston to make the piston shrink inward and open the needle free positive pressure joint.本創作有關於一種無針正壓接頭，主要包括一套管、一連接管、一彈性單元及一活塞，其中套管與連接管相連接，而活塞及彈性單元則位於套管及連接管內部，且活塞可在套管及連接管內位移。在未連接輸送管時，彈性單元會將活塞往外推並關閉無針正壓接頭，而在連接輸送管時，輸送管則會壓迫活塞，使得活塞向內縮並開啟無針正壓接頭。
