Sources of feathers are abundant, and feathers are biodegradable and their products are harmless. Feather contains 90% feather keratin. If the keratin could be effectively used, the waste feather,the environmental pollution, will become valuable resources. The special structure of keratin determines it has some properties of light, strong and tough, which make the keratin being an ideal material for the preparation of keratin composites. The research progress on the extraction methods of feather protein in recent years was reviewed, and the application of feather protein, especially in wastewater treatment, regenerated fiber and composite materials was summarized.