The invention discloses coking ash blended fuel, and a preparation system, a preparation method, an application system and an application method of the coking ash blended fuel, and belongs to the technical field of blast furnace injection production. The coking ash blended fuel is formed by mixing injected pulverized coal and coking ash of which the mass ratio is (90-98):(2-10), wherein the particle size of the coking ash is smaller than 200 meshes. The combustion ratio of the coking ash blended fuel is high and reaches the level of the combustion ratio of traditional blast furnace fuel; after the coking ash blended fuel is applied, the quantity of heaped and abandoned coking ash can be reduced, meanwhile, the use quantity of the traditional blast furnace fuel is reduced, environmental pollution is reduced, and cost is saved. The coking ash blended fuel can be prepared through the preparation system and the preparation method. The coking ash blended fuel can be applied to a blast furnace through the application system and the application method.