The invention disclose a high speed streamline aided injecting nozzle, comprising nozzle 1 and circle sleeving 2, which contains a first segment I, a second segment II and a third segment whose bore is taper. The bores of the first segment I and the second segment II are cylinder. Taper guide pipeline 3 is set in the first segment I. said bore walls of the third segment III, the second segment II and guide pipeline 3, which are seamless, are connected orderly, and the bore walls of the first segment I, the second segment and guide pipeline 3, which are seamless, are connected orderly. The invention is provided with favorable jetting for air flow, no air flow reflection and disorder phenomenon. |