Backwash aquarium filter tank

The utility model discloses a backwash aquarium filter box, including filter box body, first water inlet pipe, second water inlet pipe, water outlet pipe and sewage pipe, the water outlet pipe is provided in the upper position of filter box body, the sewage pipe is provided in the lower position of filter box body, the filter box body is provided with a plurality of layers, each layer is provided with a filtering material, the first water inlet pipe is arranged at the lower position of the filtering box body, the second water inlet pipe extends to the middle position in the filtering box body from the outside, and water is sprayed upwards at a water outlet in the end part of the second water inlet pipe in the filtering box body; wherein the first water inlet pipe is connected with the second water inlet pipe, a three-way electromagnetic valve is arranged between the first water inlet pipe and the second water inlet pipe for switching water feeding of the first water inlet pipe and the second water inlet pipe,