NOVELTY - Preparing composite fertilizer involves preparing fat absorption matrix by mixing carbonized wood residue (1 parts) with perlite (6-10 parts), where particle size of carbonized wood residue is 400 mesh, and perlite is preheated at 1000-1300 degrees C to obtain a porous material. Obtained mixture is heated at 60-65 degrees C for 10-15 minutes. Fertilizer matrix is prepared by mixing starch (1 parts), and clay powder (45-55 parts) to obtain another mixture, where particle size of clay powder is 200 mesh. Fertilizer pro-matrix is prepared by mixing soil with broad bean plant roots.    USE - Method for preparing composite fertilizer (claimed).    ADVANTAGE - The method enables to prepare organic fertilizer in cost -effective and eco-friendly manner.    DETAILED DESCRIPTION - Preparing composite fertilizer involves preparing fat absorption matrix by mixing carbonized wood residue (1 parts) with perlite (6-10 parts), where particle size of carbonized wood residue is 400 mesh, and perlite is preheated at 1000-1300 degrees C to obtain a porous material. Obtained mixture is heated at 60-65 degrees C for 10-15 minutes. Fertilizer matrix is prepared by mixing starch (1 parts), and clay powder (45-55 parts) to obtain another mixture, where particle size of clay powder is 200 mesh. Fertilizer pro-matrix is prepared by mixing soil with broad bean plant roots, where particle size of broad bean plant roots is 100 mesh. Organic fertilizer is prepared by mixing baking powder (1 parts), broad bean straw powder (9-11 parts), and animal waste (45-55 parts) to obtain third mixture. Obtained mixture is fermented for 40-45 days to obtain organic fertilizer, where moisture content of animal waste is 30-40%, and particle size of broad beans is 2mm. Obtained product is mixed with sucrose (100 parts), and water (10 parts) at 60 degrees C to obtain a solution. Obtained solution is mixed with rice bran (50 parts), tea residue (50 parts), soybean meal (39 parts), and yeast (1 parts) and fermented at 65-75 degrees C for 40-45 days. Black fungus powder (200 parts) is mixed with fermented product to obtain fourth mixture. Obtained product is mixed with absorption release matrix material (1 parts), fertilizer matrix (1 parts), fertilizer pro matrix (1 parts), and organic fertilizer (7-13 parts) to obtain sixth mixture. Obtained product is mixed with nitrogen, phosphorus pentoxide, and potassium oxide in a ratio of 9:2:3:86 to obtain seventh mixture. Obtained product is granulated to obtain final product.