The invention discloses a flute introduction assisting device. The device comprises an air guide port, an adjusting bolt, a mouth corner locating frame adjusting device and a main body pipe, wherein the main body pipe is a non-sealed elastic round pipe, and the diameter of the main body pipe can be adjusted via the adjusting bolt; a notch, from which a flute blow hole is exposed, is formed in themiddle of an opening of the main body pipe; the air guide port is arranged in the notch in the outer side of the main body pipe, so that a lip placing position can be accurately found by a user; and the mouth corner locating frame adjusting device is fixedly arranged at the outer side of the main body pipe. On the basis of a precondition that blowing tune of a flute is guaranteed, a baseless person can rapidly master the right lip position through the design of the air guide port, and a good mouth shape can be kept by adjusting the mouth corner locating frame adjusting device; different flutediameters can be adjusted via the adjusting bolt; and the device is convenient and simple to mount and using demand can be satisfied; and meanwhile, subsequent detaching and maintenance can be also facilitated.