The utility model discloses a stop mechanism of a flying tourbillon, which comprises a flying tourbillon component, a pair of stop clippers, a stop clipper return spring and a control lever. The central shaft of the flying tourbillon component is installed on a base plate through a jewel bearing, the stop clippers is fixed inside a watch movement through a shaft center bolt and a connecting piece,and the front ends of the stop clippers are arranged on the two sides of the central shaft of the flying tourbillon; the stop clipper return spring is pressed at the rear end of the stop clippers andis fixed inside the watch movement through a stop clipper return spring bolt and a connecting piece; and the control lever is fixed inside the watch movement through a control lever shaft and a connecting piece, the inner side end of the control lever is arranged inside the groove of the stop clippers, and the outer side end thereof is arranged inside the transverse groove of a sliding pinion oris arranged inside the groove of the control lever shaft through a connecting lever. The stop mechanism can stop the flying tourbillon through the clamping action of the stop clippers to the central shaft of the flying tourbillon, so as to ensure the start of the movement at a precise time point; and does not change the original output torque of the spiral spring of the movement. The stop mechanism has simple and reliable structure and convenient processing, and can meet the stop requirement of the movement of the flying tourbillon.