The present invention discloses a wind cup mounting bracket applied to tunnel ventilation air speed or air flow testing. The wind cup mounting bracket comprises an air duct wall where a test section is located; a plurality of right-angled triangular bases are fixed side by side to the bottom of the air duct wall where the test section is located; circular vertical bars are fixed to one side of each right-angled triangular base; the bottoms of the circular vertical bars are provided with jacks; and the circular vertical bars are connected with a plurality of square cross bars through cross bar clamping buckles, wherein the square cross bars can move up and down along the circular vertical bars, the square cross bars and the circular vertical bars are arranged in a manner that the square cross bars are perpendicular to the circular vertical bars, and the square cross bars are provided with a plurality of wind cup bases which are used for mounting wind cups and can move rightwards and leftwards along the square cross bars. According to the wind cup mounting bracket of the invention, the angle bar bases, the circular vertical bars each of which is segmented so as to be lengthened, the square cross bars each of which is segmented so as to be lengthened, the cross bar clamping buckles which can slide along and lock the vertical bars, the wind cup bases which can horizontally slide along the square cross bars, and the like are effectively assembled so as to form an integrated detection device; and the detection device can be matched with an existing test instrument so as to realize the ventilation test of a tunnel.