The invention discloses a filling bed COREX stove braise preparing and blowing method which comprises the following steps of: a) putting mine run coal which is applicable to melting in the COREX stove and producing reducing gas into a run coal bin by crushing and screening the mine run coal into crushed coal; b) milling the crushed coal to minus 200 meshes and above 60 percent by a coal-milling device provided by a coal feeder and carrying out drying at the same time; and c) putting the finished braise into a pulverized coal bunker after the separation of gas and powder; loading the braise into 2 or 3 coal injecting tanks sequentially; transporting the braise to a distributor mechanism positioned at the top of a melting gasification furnace of the COREX stove by using pressured gas after the processes of pressurizing fluidization and gas supplement; distributing the braise to the blowing branch pipe which is led to the oxygen tuyere of the melting gasification furnace; spraying the braise into the melting gasification furnace by a coal injection gun. The method has the advantages that the in-place digestion and utilization of powder sifted range coal of the filling bed COREX stoveis realized; and the total coal consumption of the COREX stove can be reduced by replacing part range coal; therefore, the cost of production is reduced; more optimized COREX melting reduction process and more flexible operation are realized.