NOVELTY - Preparation of microbial fertilizer involves grinding crop straw, mixing effective microorganisms with brown sugar, standing overnight, diluting with water, culturing, diluting to 5% concentration to obtain active bacteria liquid, mixing 70% crop straw powder with 5% corn flour, 5% rapeseed cake, 5% bamboo leaf fertilizer and 15% active bacteria liquid, fermenting to prepare an active matrix, placing in fermentation tank, sealing, inserting thermometer at the top of the pile, recording temperature every day, turning, fermenting, drying, cooling, granulating and packaging.    USE - Method for preparing microbial fertilizer (claimed) used for improving soil quality.    ADVANTAGE - The method is simple. The product is low-cost and environment-friendly.    DETAILED DESCRIPTION - Preparation of microbial fertilizer comprises grinding crop straw with length of 1-3 cm to particle size of 10 mesh, mixing effective microorganisms with brown sugar at mass ratio of 1:1, standing overnight, diluting with water to 10% concentration, culturing for 24 hours, diluting to 5% concentration to obtain active bacteria liquid, mixing 70% crop straw powder with 5% corn flour, 5% rapeseed cake, 5% bamboo leaf fertilizer and 15% active bacteria liquid, fermenting at 30 degrees C for 1-7 days to prepare an active matrix, spraying with 5% active bacteria liquid, placing in fermentation tank, adding 25 kg corn straw powder/500 kg active matrix to 20-30 cm high, uniformly spreading with mixture of chicken manure and dry soil at mass ratio of 1:1 to 5 cm high, adding 5-7 kg active matrix, 5-15 kg water and 5-15 kg rapeseed cake and bamboo leaf fertilizer/500 kg corn straw powder, sealing with plastic film covering for rapid temperature rise, inserting thermometer at the top of the pile, recording temperature every day, turning to measure temperature rise at 60 degrees C, fermenting, removing plastic film to accelerate propagation of aerobic microorganisms, controlling moisture content to 55%, turning once for 7-10 days, turning for 3-5 times, covering with white fungus, terminating fermentation process until no odor is observed, color of pile body changes to black, particle size of crop straw becomes smaller and fermentation materials becomes soft, drying, cooling, granulating and packaging.