Observation on the digestive tract mucosa of Siniperca chuafai was conducted by using the scanning electron microscope. The surface characteristics of the digestive tract's structure was described, and the taste bud's types and distribution in the surface of digestive tract were discussed. The results show that the taste bud of S. chuafai distributes over the oral-pharyngeal cavity widely and there are three critical types taste bud. The structure of microridges on the esophagus mucosa epithelial cells is clear. There is a line of small tooth in branchial arch, arranging in good order, and goblet cells also can be seen obviously. The boundary line of stomach mucosa epithelial cell is so clear, and the cells are round and sticking out. The substances on the midgut and hindgut increases gradually. The relationships between the structure of digestive tract and their function were also discussed.