NOVELTY - Producing bio-organic fertilizer comprises e.g. chopping the dry straw to 2-5 cm length, mixing straw, wheat bran, biological fungus liquid evenly, controlling temperature, processing to obtain straw mixed substrate, building heat preservation greenhouse, carrying out stacking fermentation in greenhouse, stacking 6 layer according to the layer stacking method, fermenting under natural condition, during turning fertilizer, turning fertilizer temperature must not exceed 65 degrees C, spraying diluted 50-100 times biological bacteria, and fermenting until mature.    USE - The method is useful for producing bio-organic fertilizer (claimed).    ADVANTAGE - The fertilizer can decompose organic protein, starch, fat, cellulose, and lignin and transforms into small molecule for plant easy absorption; comprises beneficial microorganisms and their metabolites which can break down ammonia, amine salts, sulfides, and phenols having odor and harmful substances; increases total crop yield. The method does not produce odor during production process.    DETAILED DESCRIPTION - Producing bio-organic fertilizer comprises (i) crushing and mixing straw: chopping the dry straw to 2-5 cm length, mixing straw, wheat bran, biological fungus liquid at ratio of 100:10:1, mixing evenly, controlling temperature at 40-50%, processing for 3-6 days to obtain straw mixed substrate, (ii) stacking fermentation: building heat preservation greenhouse, carrying out stacking fermentation in greenhouse, where the stacking method is: stacking 8-15 cm straw mixed substrate at bottom, then 5-10 cm animal excrement, spray diluting 50-100 times biological fungus liquid, stacking to 6 layer according to the layer stacking method, and (iii) turning fertilizer: fermenting under natural condition, during turning fertilizer, internal temperature is maintained at 56-63 degrees C, turning fertilizer temperature must not exceed 65 degrees C, spraying diluted 50-100 times biological bacteria, and fermenting for 10-20 days until mature.