The invention particularly discloses a dust removal drying machine for vegetable dehydration. The dust removal drying machine comprises a drying machine body and a dust collector. The drying machine body comprises a machine frame, a drying box and a heating device. The drying box and the heating device are fixedly installed on the machine frame. The dust collector is arranged on the machine frame. A sucker of the dust collector stretches into the drying box. The sucker is fixedly arranged on the side wall of the drying box. A drying drum is arranged inside the drying box. A working cavity for containing vegetables is formed in the drying drum. A through hole or a through groove communicating the dying box with the working cavity is formed in the side wall of the drying drum. The drying machine does not depend on manpower, dust inside the drying drum and the drying box can be automatically removed under the effect of the dust collector, meanwhile, vegetables will not be damaged, and therefore the drying machine is quite practical.