Rotatable head controllable air quantity noise reduction blast jet

The utility model relates to a silencing blowing nozzle with adjustable head rotation air quantity. In the utility model, the external of the outlet end of the blowing spout is provided with an intercept ball body which can rotate in a spherical support, and a steering apparatus can adjust the blowing angle according to different requirements of winter blowing and summer blowing; one blowing end of the blowing nozzle is especially provided with an adjusting valve which has simultaneously the functions of throttling, diffluentence and flow equalization, and the adjusting valve has low tendency to generate vortex flow; the blowing nozzle is communicated with a half-moon cavity in the intercept ball body by a small hole to form a resonance cavity to perform the silencing effect; a blowing nozzle body and a steering mechanism are snugly arranged in a static pressure box or a blowing pipeline, which is favorable for inner decorating coordination of a building, and an exposed part is similar to cats eyes, which has a finite decorative effect.