The invention discloses a dust removing device for the fabric machining process. The dust removing device comprises a supporting platform and a rack. The supporting platform is located at the left endof the rack. Brackets are fixedly installed at the four corners of the lower surface of the rack. The front end of a winding shaft penetrates through the bottom end of the front side wall of the rack. A motor rotates and then drives the winding shaft to rotate, then fabric is tensioned through a tensioning wheel set, and the tensioned fabric is further wound; when the fabric passes the position between a first guiding shaft and a second guiding shaft, a vibration motor in a vibration device works and then drives an eccentric wheel to rotate, a vibration head is closely attached to the fabricand then vibrates down all dust on the fabric, and at this time, an inner cavity of the rack is filled with the dust; and a draught fan on a dust collection device is started to work, sucks air in theinner cavity of the rack from an air inlet and then sucks the dust, in this way, the manual labor force can be greatly reduced, the quality of the fabric is improved, and the quantity of the fabric is increased.