The utility model relates to a needle-free medicine adding positive pressure connector mainly used for being connected with an intravenous conduit for injection, gravity infusion, fluid taking and intravenous infusion. The rubber plug of the positive pressure connector is opened through a Luer joint, so as to realize single-direction liquid flowing and further avoid contamination caused by particles and tiny chips; and when an injector is unplugged, positive pressure is generated by the positive pressure connector, and the fluid inside the positive pressure joint is pushed forward, so as to avoid thrombus caused by blood flowing back to an indwelling needle and further avoid blockage of the indwelling needle.