The invention discloses an antistatic ecological bacteriostatic down fiber, which is characterized by being prepared from the following raw materials by weight part: 25-30 of duck down, 13-17 of goat wool, 3-5 of bast fiber, 2-4 of mulberry bark fiber, 5.2-7.4 of chitin, 4.2-6.6 of methyl triethoxysilane, 1-2 of far infrared negative ion micropowder, 2-3 of nano-titanium dioxide, 6-8 of white tea extracted liquid, 0.4-0.8 of amino sodium triacetate, 180-200 of 1-butyl-3-methylimidazole chloride, and a proper amount of water. The preparation method involved in the invention has simple process conditions and operation method, and is convenient for mass production. Compared with traditional down, the prepared fiber ecological bacteriostatic down fiber has thorough antibacterial performance, excellent antistatic performance, and improved warmth retention, and has the heat preservation rate increased by 8%, thus having broad market application prospects.