NOVELTY - Production of organic fertilizer by fermenting and treating rice and wheat straw waste, involves pulverizing the rice-wheat straw waste into straw waste, adding the pulverized rice-wheat straw waste into stirring groove, fermenting the mixture using microbial composition, overturning and repeating the fermentation process, performing fermentation with the compost and allowing to rot, and the obtaining organic fertilizer after grounding and screening the mixture.    USE - The method is useful for producing organic fertilizer using rice and wheat straw waste.    ADVANTAGE - The method is simple and inexpensive. The straw waste can be recycled.    DETAILED DESCRIPTION - Production of organic fertilizer by fermenting and treating rice and wheat straw waste, involves (a) pulverizing the rice and wheat straw waste into material (diameter is 2 cm or less) using straw grinder to remove impurities (iron wire, stone block, plastic and clod), and intensively stacking the straw waste, (b) adding the pulverized rice and wheat straw waste into stirring groove, adjusting the moisture content using wet dairy manure and the carrier-to-noise ratio (C/N), the water content is adjusted to 65%-75%, and the C/N adjusted to 22/1, (c) fermenting the mixture using microbial composition (0.3%), where the microbial composition comprising Bacillus subtilis, Clostridium and Rhizopus nigricans in weight ratio of 0.9-1.1:0.9-1.1:0.9-1.1, the viability of B.subtilis is 1.0x 109 colony forming units (cfu)/g or more, Clostridium is 1x 109 (cfu)/g, and the R.nigricans is 1x 109 (cfu)/g, (d) overturning and repeating the fermentation process, nourishing and propagating the microbial composition to generate carbon dioxide and water, the heat is synchronously generated to make the temperature of the compost increase to 60-75 degrees C, and kill the pathogenic bacteria, and grass seed, the turning machine is used for turning so as to control the temperature reduce gradually from the low to high and to improve the hazard-free treatment degree, maintain for 10-15 times, the water content is 45%-50%, (e) performing fermentation with the compost and allowing to rot, undecomposed organic matter in the primary fermentation process continues to be decomposed and gradually converted into stable matured compost, when the compost inner temperature is stabilized below the 40 degrees C, the after-ripening fermentation is finished, and the organic fertilizer is obtained after grounding and screening the mixture.