The invention supplies a method to produce organic fertilizer. The zymophyte agent is made up from brood cell bacilli, lactobacillus, photosynthetic bacteria, azotobacteria, yeast, filamentous fungus, and actinomycete. The expanding culture formula is 40% bean pulp, 30% wheat bran, 25% rice hull powder, 1.5% dextrose, 1% ZnSO4, 1% B, 1% MgSO4, and 0.5% peptone. The fermenting stockpile includes solid swine waste, 25% rice straw, 10% weathered coal, and 5% calcium superphosphate. The process steps includes: filtering swine waste, adding rice straw and weathered coal, adjusting carbon and nitrogen and water ratio, whisking to equal, inoculating microorganism fungus agent, high temperature fermenting, after being aged, drying, filtering, checking and packaging. The invention has the advantages of easy to operate, low cost, and less foul gas, etc.