The invention discloses a special liquid microorganism fertilizer capable of preventing hardening and promoting growth for wheat. The special liquid microorganism fertilizer is prepared from the following components in parts by weight: 20 to 50 parts of nitrogen fertilizers, 30 to 40 parts of phosphate fertilizers, 10 to 30 parts of potassium sulfate, 5 to 8 parts of boric acid, 3 to 7 parts of zinc sulfate, 2 to 5 parts of ammonium molybdate, 3 to 6 parts of ethylene diamine tetraacetic acid (EDTA) iron chelate, 4 to 5 parts of EDTA manganese chelate, 10 to 12 parts of chitosan, 10 to 15 parts of amino acids, 5 to 6 parts of fulvic acid, 1 to 2 parts of sodium polyacrylate, 20 to 30 parts of microbial agents, 15 to 25 parts of traditional Chinese medicine extraction solutions, and 1000 parts of deionized water. The microbial agents are composite microbial agents comprising 20 to 30 percent of bacillus subtilis, 15 to 25 percent of bacillus laterosporus, 18 to 25 percent of bacillus amyloliquefaciens, 10 to 20 percent of geobacillus stearothermophilus and 12 to 18 percent of bacillus mucilaginosus. The traditional Chinese medicine extraction solutions are obtained by mixing radix sophorae flavescentis, herba artemisiae annuae, folium artemisiae argyi, flos lonicerae, rhizoma polygoni cuspidati, northeastern radix gentianae, rhizoma atractylodis, radix cynanchi paniculati extracts and the like in proportions. According to the fertilizer disclosed by the invention, disease-resistance and disease-prevention abilities of the wheat are improved, and the soil is improved.