Wind machine blade with noise reduction function

A wind machine blade with a noise reduction function comprises a blade tip part (11) and other parts (12) of the blade, which are formed integrally. The length of the blade tip part (11), along the unfolding direction of the blade, is 1.5 times of the chord length of the section of a root part of the blade; the chord length from the top of the blade tip part (11) to the cross section of the root part gradually enlarges; an outline of the blade tip part (11) comprises a frontal edge part A, a top end part B, a transition part C and a tail edge part D; the B, C and D parts of the outline are undulated; and sawtooth sections are arranged on the edges of the B, C and D parts of the outline.