The utility model relates to a biont cultivation technical field discloses a circulation ecological culturing system. The utility model discloses the upper strata is bred to distinguish and comprises relatively independent colony house, is provided with hourglass dropping board between upper strata breed district and middle level fermentation are distinguished, and the middle level fermentation is distinguished and comprises relatively independent fermentation chamber, and the fermentation chamber is corresponding with the colony house on upper strata, the fermentation chamber is bred to distinguish with the earthworm and is connected, and the earthworm is bred the district and is connected with planting district and the fermented district of fertilizer respectively, the hourglass dropping board of every colony house below is provided with the bucket shape and connects the excrement groove, and the bucket shape connects excrement groove top and leaks dropping board sealing connection, and the bottom is connected with liquid dung pipeline, and the bucket shape connects the excrement inslot to incline to be provided with the filter screen, and feces outlet has been seted up on connecing excrement groove lateral wall to the bucket shape of filter screen bottom, is equipped with the bottom plate between fermentation chamber and the settling zone, and the bottom plate upper berth is equipped with the straw bed course, and liquid dung pipeline lets in the lower floor settling zone downwards, the liquid outlet has been seted up to the settling zone lateral wall, is connected through conduit and planting district irrigation pool.