NOVELTY - Producing soil humus using crop stalks, by crushing crop stalks, adding livestock excrement to crushed crop stalks, adding urea or ammonium sulfate, manganese oxide, hydroquinone and phosphorus gypsum to wet crop stalks, stirring components, stacking mixture, maintaining humidity of haystacks, sealing haystacks with plastic film, allowing fermentation to occur, uncovering haystacks, turning haystacks, again covering haystacks with film at its periphery, and drying obtained fermented mixture under sunlight to obtain the soil humus.    USE - The method is useful for producing soil humus used as organic soil matter during plantation of wheat, rape, rice, corn and peanut, or applied to fields before and after harvesting (all claimed) of crops, or as high quality organic fertilizer in farmlands for cultivation of grains and vegetables.    ADVANTAGE - The method is environmentally-friendly, as air pollution caused due to crushing of the crop stalks is avoided. The soil humus increases content of organic matter and soil fertility in the farmland, reduces emission of greenhouse gas from the farmland, and promotes carbon sequestration of soil and development of ecological agriculture.    DETAILED DESCRIPTION - Method for producing soil humus using crop stalks, involves (a) crushing crop stalks into 5-30 cm long sections, (b) adding livestock excrement to crushed crop stalks in an amount 10-60 wt.% with respect to weight of the crushed crop stalks, such that the crushed crop stalks become completely wet, (c) adding components comprising 5-8 kg urea or 1-12 kg ammonium sulfate, 0.05-1 kg manganese oxide, 0.001-1 kg hydroquinone and 1-10 kg phosphorus gypsum to per 1000 kg of the wet crop stalks, stirring all the added components, stacking obtained mixture up to length of 2-15 m, width of 1-8 m and height of 1-2 m, and maintaining humidity of haystacks at 40-60%, and (d) sealing the haystacks with plastic film, allowing fermentation to occur, uncovering the haystacks every 6 days times preferably every 12 days during autumn season, turning the haystacks for 3-4 times, covering the haystacks with film at its periphery, and drying obtained fermented mixture under sunlight for 3-5 days to obtain the soil humus.