NOVELTY - Processing vegetable straw waste to obtain organic fertilizer by fermentation, comprises: (a) pulverizing vegetable straw waste by a straw pulverizer and removing foreign matter; (b) pouring the pulverized straw waste to a stirring groove; (c) adding composite microbe for fermentation; (d) overturning the pile to maintain primary fermentation; and (e) after-ripening and fermenting.    USE - The method is useful for processing vegetable straw waste to obtain organic fertilizer by fermentation (claimed).    ADVANTAGE - The method is simple in technique and makes the waste resource circularly utilized; the invention provides an ideal method for processing greenhouse vegetable straw waste with low cost and high efficiency.    DETAILED DESCRIPTION - Processing vegetable straw waste to obtain organic fertilizer by fermentation, comprises: (a) pulverizing vegetable straw waste by a straw pulverizer (with grain diameter less than or equal to 2 cm) and removing foreign matter (such as iron wire, stone block, plastics and clod), and then intensively piling; (b) pouring the pulverized straw waste to a stirring groove, adjusting content of water and C/N by dry dairy manure till water content is 60-70% and C/N is about 25:1; (c) adding 0.1% of composite microbe for fermentation, the composite microbe being composed of Bacillus subtilis, Trichodermin and Aspergillus niger in the ratio of 0.9-1.1L 0.9-1.1: 0.9-1.1, where number of B. subtilis viable bacteria is more than 1.0x1010 (cfu)/g; Trichodermin being more than 1.0x1010 (cfu)/g and A. niger being more than 1.0x1010 (cfu)/g; (d) overturning the pile to maintain primary fermentation: the composite microbe can propagate by taking organism that can be easily broken down to produce CO2 and water and it also can produce heat at the same time to make temperature of the compost quickly rise to 60-75 degrees C, killing pathogenic bacteria, eggs and grass seed, using pile overturning machine to overturn pile and control temperature of the compost gradually fall after rise from top down; in order to improve harmless processing degree, maintaining the stage for 10-15 days; water content of the material being reduced to be 40-50% after primary fermentation for rise of temperature during the stage; and (e) after-ripening and fermenting: conveying the primarily fermented piled fertilizer to an after-ripening and fermenting place to continue to be piled and rotten, where, during the primary fermenting process, the organism that is not broken down can be continued to break down and can be gradually transformed to stable rotten compost; when temperature of the compost is stabilized lower than 40 degrees C, the stage of after-ripening and fermenting is ended; organic fertilizer product can be obtained by pulverizing and filtering.