NOVELTY - Complete recycling method for eiderdown wastewater comprises introducing wastewater into grit basin for removing large particle impurities in wastewater, and pumping into feather-fishing machine;#inflating air via jetting, removing dissolved and suspended impurities in wastewater, and introducing water from air floating pool into biological contact oxidation pond which is filled with braided type filling material provided with biological membrane; and#consequently using sludge concentration tank, discharging mud and slag in the sludge and scum, and entering sludge concentration tank.    USE - Complete recycling method for eiderdown wastewater (claimed).    ADVANTAGE - The method has low treatment cost, achieves zero discharge, and recycles eiderdown.    DETAILED DESCRIPTION - Complete recycling method for eiderdown wastewater comprises:    (A) introducing wastewater into grit basin for removing large particle impurities in wastewater, and pumping into feather-fishing machine;    (B) separating upper suspension or semi-suspension solid substance that is more than 0.2 mm, after filtering and removing, and introducing wastewater into regulating pool which is divided into multiple pools which are provided with independent aerating systems;    (C) pre-aerating, fully homogenizing water quality and water yield, and introducing water from regulating pool into air floating pool which is provided with multiple jet-flow machines;    (D) inflating air via jetting, removing dissolved and suspended impurities such as feather in wastewater, and introducing water from air floating pool into biological contact oxidation pond which is filled with braided type filling material provided with biological membrane;    (E) removing large amount of pollutants in wastewater via metabolism of microorganism, and introducing water from biological contact oxidation pond into secondary settler;    (F) removing microorganism membrane fallen off in biological contact oxidation pond and other impurities;    (G) refluxing sludge on bottom part into the biological contact oxidation pond, and introducing water from secondary settle into clarifying pool;    (H) further removing suspension liquid in water, and introducing water from clarifying pool into non-valve sand filter pond;    (I) when operating non-valve sand filter pond, keeping water level of effluent to constant, where water level of fed water is risen in syphon along with increase of loss of water head of filter layer;    (J) when water level reaches top of syphon and siphons, backwashing filter layer automatically, and discharging backwashed muddy water from pond along with syphon;    (K) introducing water from non-valve sand filter pond into disinfecting pool for treating so that water quality of wastewater can meet requirement of industrial water; and    (L) consequently using sludge concentration tank, discharging mud and slag in the sludge and scum, and entering sludge concentration tank.    An INDEPENDENT CLAIM is included for a special non-driving power feather-fishing machine which comprises water distributing tank installed on upper part of machine frame, sieving groove installed on the machine frame in inclined manner, and water collecting tank installed at lower end of sieving groove and slag hopper, where wastewater inlet is arranged at back of water distributing tank, and water baffle for dividing water distributing tank into front and back part is fastened in internal part. The water baffle is higher than wastewater inlet, and lower part is provided with water distributing nozzle which is connected with upper opening of sieving groove having groove body with U-shaped cross section and composite type sieving plate.