The utility model discloses a sewage treatment device for feather processing. The utility model relates to the technical field of feather processing, blowdown pipe, settling tank connected with blow-off pipe, the sedimentation tank is connected with a flocculant box; a first stirring rod is arranged in the sedimentation tank; the first stirring rod is connected with a first motor; a sludge area isarranged at the bottom of the settling pond; a sludge leaking plate is arranged above the sludge area; settling tank provided with water outlet, the water outlet is connected to a collecting box through a water outlet pipe; the collecting box is provided with a feather filter screen; water leakage openings are formed in the lower ends of the collecting boxes; water leakage port connection greasepool, the grease pool is connected with the acid-base pool; the acid-base tank is connected with the standing tank; a second stirring rod is arranged in the standing tank; according to the sewage treatment device disclosed by the utility model, feathers in sewage are recycled through the feather filter screen, and meanwhile, the sewage is purified through the sedimentation tank, the grease tank, the acid-base tank and the sedimentation tank, so that water resource reutilization is realized, resources are saved, and the environment is protected.