Full-intelligent filtering system of fish tank

The utility model discloses a full-intelligent filtering system of a fish tank. The utility model relates to the technical field of fish tank filtering, key points of the technical scheme are as follows: the key points are as follows; the fish tank comprises a frame, an upper-layer fish tank and a lower-layer fish tank, the lower-layer fish tank is provided with a water outlet; a drainage pipe isconnected to the drainage port; one end of the drain pipe is connected with a first filter; wherein the filtering device comprises a pre-filter, a rough filtration water storage tank, a first water pump and a return water filter which are sequentially connected through a pipeline; the rough filtration water storage tank is further connected with a second filtering device, the second filtering device comprises a protein separator, a second water pump and a filtering barrel which are sequentially connected through a pipeline, and the water outlet end of the filtering barrel is connected to the upper-layer fish tank thro