Tea blossom and tea leaf hare the same root system, however, the tea blossom is often regarded as the waste of tea tree without well utilization, which results in the waste and loss of resources. Tea blossom is rich in active substances, and there are similar polysaccharides in tea blossom and tea, while the content of polysaccharides in tea blossom is significantly higher than that in fresh tea leaf. Tea flower polysaccharides have many functions, such as lowering blood sugar, antioxidant, immunomodulatory, anti-tumor, liver protection, anticoagulant and etc. It might be a very valuable new resource food. The main extraction methods of tea flower polysaccharides included solvent extraction, enzyme extraction, microwave-assisted extraction and ultrasonic assisted extraction. The purified tea flower polysaccharides were obtained via deproteinization, decolorization, chromatographic column classification and other purification processes from crude tea flower polysaccharides. At present, there was few report focused on tea flower polysaccharide, which is worthy of further study. Focusing on the new resource food of tea blossom, this paper expounded the functions, extraction methods, separation and purification methods of tea flower polysaccharides, and introduced its current research progress, so as to provide new research ideas for the development and utilization of tea flower polysaccharides and its active substances.