Ecological fish tank with circulating self-cleaning function

The utility model relates to an ecological fish tank with a circulating self-cleaning function, which comprises an ornamental fish culture tank body, a water quality purification tank body, a culturewater extraction mechanism and a circulating water supply mechanism, a bottom dirt containing area, a nitrifying bacteria filler area, a rock stratum filtering area, a fine sandstone filtering area, an aquatic plant growth area and a circulating water outlet area are sequentially arranged in the water quality purification tank body from bottom to top, and the bottom of the aquarium fish culture tank body is communicated with the bottom of the water quality purification tank body through a culture water extraction mechanism. And the circulating water outlet area is communicated with the top ofthe aquarium fish culture tank body through a circulating water supply mechanism. Compared with the prior art, the fish tank system has the advantages that fish can be cultured, aquatic plants can beplanted, complementary plan