Compound down feather separator

The invention relates to down feather processing equipment, in particular to a compound down feather separator. The compound down feather separator comprises a compartment, wherein an inner space of the compartment is divided into a raw material compartment and a finished product compartment by a baffle plate; a movable spacing plate is arranged in the raw material compartment; the lower end of the movable spacing plate is hinged to the raw material compartment, and the upper end of the movable spacing plate is connected with a pull rope; two layers of screens are arranged at the bottom of the raw material compartment; a discharging bin is arranged in the middle of of the space below a sieve plate; impurity compartments are arranged at the two edges of the discharging bin; a raw material stirring shaft is arranged above the sieve plate; a bottom spacing plate is arranged in the middle of the finished product compartment; a stirrer is arranged below the bottom spacing plate; and discharge stirring shafts are arranged above the bottom spacing plate. The compound down feather separator enables the size of the inner space of the compartment to be changed and the flow and the flow velocity of wind to be changed to obtain needed down feathers, so that the down feather processing procedures are reduced, and the product quality is improved; and the two-layer screen structure enables the size of sieve holes to be changed easily so as to treat down feather raw materials with different qualities.