The invention belongs to the technical field of down feather production, and particularly relates to a fine down feather production process and device. By aiming at the problems that at present, downfeather production sterilization operation is inconvenient, efficiency is low, down feather filaments and immature small down feather piles are screened and removed mainly through a manual sorting means, and the efficiency is low, the following scheme is provided, wherein the process comprises the following process steps of S1, washing down feather with water, S2, dewatering and air-drying the down feather, S3, achieving sterilizing by using an electric field, S4, screening the down feather, and S5, carrying out down filling and sewing. In S1, a detergent and a stench removing agent are addedinto a cleaning solution, and the down feather can be cleaned; and in S2, a dewatering machine is used for dewatering the down feather, and then a dryer is used for drying the down feather. Accordingto the process and device, operation is convenient, the down feather can be effectively sterilized, meanwhile, down feather filaments and immature small down feather piles can be prevented from beingmanually screened out, and efficiency is improved.