Cloth-needling thread-hooking device of sewing machine

The invention discloses a cloth-needling thread-hooking device of a sewing machine. The cloth-needling thread-hooking device comprises a power shaft and a rotating shuttle shaft, wherein the power shaft is arranged at a machine body in a rotatable manner under the drive of a driving source; the rotating shuttle shaft is arranged on the machine body and synchronously rotates with the power shaft; a transmission mechanism is arranged between the power shaft and the rotating shuttle shaft; the power shaft is provided with a cam; a driven post rod is arranged above the cam and the lower end part of the driven post rod can slide up and down along the sliding of the external contour of the cam; the upper end of the driven post rod is hinged with one end of a connecting rod; the middle part of the connecting rod is hinged on the machine body; the other end of the connecting rod is hinged with a needle rod of which the lower end is provided with needles; the needle rod is vertically arranged;rotating shuttles corresp