The invention relates to the field of garment processing machinery, in particular to a thread end sucking machine. The thread end sucking machine comprises an underframe, a suction fan, an exhaust pipe, an air intake pipe and an air intake room, wherein the air intake room is arranged at the top of the underframe, and the air intake room and the underframe are of an integrated structure. The innerpart of the air intake room and the inner part of the underframe form a channel penetrating from top to bottom, and the inner chamber of the air intake room communicates with the air intake pipe. Theair intake room comprises a chamber body, a chamber cover, at least two lifting and clamping components and a control box, and each lifting and clamping component comprises a collar lifting and clamping device and two clothes edge lifting and clamping devices and is electrically connected with the control box. By the arrangement of the lifting and clamping components, the thread end sucking machine fixes clothes in the air intake room by a clamp to suck threads and does not need a worker to always grasp the clothes, thereby reducing the labor intensity of the worker. Meanwhile, the lifting and clamping components can fold the clothes, the thread end sucking machine respectively suck the threads on the inner side and the outer side of the clothes, and therefore the threads are sucked morethoroughly and efficiently.