Down filling machine with air circulation device

The utility model discloses a down filling machine with an air circulation device, which relates to the technical field of down filling machines, and comprises a down filling unit, a first three-way valve and a second three-way valve, the top of the down filling unit is provided with a dust removal cloth bag, and the left side and the right side of the dust removal cloth bag are provided with circulation pipes; the first three-way valve is connected to the end, away from the dust collecting bag, of the circulating pipe, one end of the first three-way valve is connected with a backflow pipe, the second three-way valve is connected to the top of the fan, and a feeding control valve is installed at the top of the second three-way valve. According to the down filling machine with the air circulation device, the second down stirring bin is communicated with the second three-way valve through the material conveying pipe, and meanwhile, dust generated during operation in the first down stirring bin is collected into