Biological organic fertilizer capable of decomposing insoluble phosphate and preparation method of biological organic fertilizer

The invention discloses a biological organic fertilizer capable of decomposing insoluble phosphate and a preparation method of the biological organic fertilizer. The biological organic fertilizer capable of decomposing the insoluble phosphate comprises a main material and an auxiliary material, wherein the main material comprises the following components by weight percent: 15%-40% of straws, 5%-20% of manioc wastes, 3%-15% of waste strains, 10%-18% of tree leaves, 8%-25% of soybean meal, 5%-20% of cottonseed meal, 2%-18% of bran and 12%-28% of sheep manure; the auxiliary material comprises 10%-45% of xerocomus chrysenteron, 0-20% of arbuscular mycorrhizal fungi, 0-20% of aspergillus, 0-20% of an effective microorganism group solution, 5%-20% of urine and 30%-80% of calcium superphosphate; and the mass ratio of the main material to the auxiliary material is (50-100) to 1. The biological organic fertilizer is prepared by a series of steps of crushing the main material, treating the auxiliary material, carrying out mixed fermentation, granulating and molding. The biological organic fertilizer has high content of organic matters and can be used for decomposing the insoluble phosphate in the soil, so that the soil is improved and the production cost is reduced.