Secondary filtering fuel tank structure

The utility model discloses a secondary filtering fuel tank structure, which is characterized in that a fuel filter is fixedly arranged in a tank body through a cover plate; the cover plate is connected with the tank body; a base plate of the tank body is of a similar conical surface structure; a similar conical surface is extended to be at an upper part of a storage tank; a ventage is designed on a tip of the similar conical surface of the base plate of the tank body; the storage tank is arranged under the ventage of the base plate of the tank body; a sectional dimension of the storage tank is larger than that of the ventage; a discharge hole is designed in the storage tank; and a fuel suction port is arranged behind the fuel filter. In a fuel tank, water, impurities and fuel can be effectively separated, the cleanness of the fuel entering into a fuel system of an engine is improved, the replacement period of a fuel-water separator and a fuel filter element is prolonged, the maintenance cost is reduced, and