A functional pond for culturing mass freshwater fishes is characterized in that a rectangle culture pond body (1) is divided into a first part (101) and a second part (102) by a water diversion wall (2), the water diversion wall (2) is of a T shape, a T-shaped transverse separating wall body (201) of the water diversion wall (2) separates the first part (101) from the second part (102, an interval is formed between the tail end of a T-shaped longitudinal wall body (202) and the pond wall of the rectangle culture pond body (1), and the second part (2) comprises a front pond portion (102a ) and a rear pond portion (102b) which are communicated with each other. According to the functional pond for culturing the mass freshwater fishes, traditional stereoscopic culture is divided according to ecological niches, so that the fishes in different ecological niches can take full advantages of different ecological niche resources, fish growth is facilitated, and the ecological efficiency and culturing benefits of pond culturing are improved; a fish feeding culture area is divided into a growth area, a feeding area, a fecal treatment recycling area and the like, the formation of flow, collection of dirt, the recycling of pollutants, regulation and control over a water body and the like are facilitated, and meanwhile, installation condition is provided for the achievement of automatic mechanized fishing and industrialized management.