Efficient winnowing device for sunflower seed harvesting

The efficient winnowing device for sunflower seed harvesting comprises a machine body assembly, and the machine body assembly comprises a machine box, a hopper, an air inducing pipe, an air blowing pipe and a discharging opening. The winnowing mechanism comprises an air blower, a flow guide sieve plate, a vibration motor, an induced draft fan, an air guide pipe, a laser level gage and a PLC (Programmable Logic Controller); and one side of the outer side wall of the case symmetrically communicates with two air inducing pipes. The vibration motor drives the flow guide sieve plate to vibrate, the vibrating flow guide sieve plate is used for guiding flow of sunflower seeds, so that the falling speed of the seeds is reduced, the staying time of the seeds in the equipment is prolonged, and then the two air blowers are used for blowing air to the seeds on the flow guide sieve plate through the air blowing pipe and the air guide pipe respectively. Dust particles and sundries carried by the seeds are blown, and then t