The invention discloses an automatic duvet filling machine, which comprises a housing and a placement plate, a cover plate is provided on the top of the housing, a leak is provided on the surface of the cover, and a partition is provided inside the leak. A hole is provided on the surface of the partition, a spring is provided on the inner wall of the top of the housing, a limit frame is provided on one side of the spring, a cavity is provided on the inner wall of both sides of the cover plate, and a press frame is provided on the inner wall of the cavity , the bottom of the housing is provided with an outlet, the outside of the outlet is provided with a bracket, the bottom of the outlet is provided with a connecting pipe, and one end of the connecting pipe is provided with a spout. In the present invention, a cover plate is provided, and the limit frame is pressed by the hand, and the limit frame produces a squeezing effect on the spring, so that the limit frame enters the interior of the housing, and the cover plate is conveniently placed on the top of the housing, and the limit frame is used to The frame and the cover plate are buckled, and then the press frame is pushed out, and the hole is used to increase the ventilation effect inside the shell, so that the fluff inside the shell can be discharged through the connecting pipe.