NOVELTY - Method for utilizing biogas slurry to prevent crop soil-borne disease, involves harvesting and cleaning greenhouse, plowing the soil, building ridges, performing fermentation, injecting fresh biogas slurry to biogas slurry storage pool, stirring, adding agent containing Trichoderma, stirring uniformly, pumping biogas slurry out of the biogas slurry pool, directly introducing the biogas slurry to the greenhouse in furrow, naturally drying or ventilating, plowing the soil and combining with base fertilizers.    USE - The method is useful for utilizing biogas slurry to prevent crop soil-borne disease (claimed).    ADVANTAGE - The method is simple, convenient to perform, and cost-effective. The processed biogas slurry is rich in nitrogen, phosphorous, potassium, amino acid, organic acid and protein, and enables to improve soil fertility.    DETAILED DESCRIPTION - Method for utilizing biogas slurry to prevent crop soil-borne disease, involves selecting leisure period of the greenhouse after the plantation, harvesting and cleaning greenhouse, plowing the soil, building ridges surrounding the greenhouse, where the ridges measure 15-20 cm in height and 15-20 cm in width, introducing anaerobic fermentation raw material in the biogas slurry engineering to an anaerobic fermentation pot for fermentation, injecting fresh biogas slurry discharged after more than 25 days of fermentation to biogas slurry storage pool in a proportion of 1000:1:3:2, stirring the biogas slurry to floating state, adding agent containing Trichoderma, phosphorus diamine fertilizer and potassium phosphate monobasic, stirring uniformly, until the components dissolves completely, adjusting concentration of the phosphorus diamine fertilizer and potassium phosphate monobasic in the biogas slurry pool to 1000 mg/l, pumping the biogas slurry out of the biogas slurry pool and then directly introducing the biogas slurry to the greenhouse in a furrow irrigation method, maintaining at least 10 cm biogas slurry on the internal surface of the soil during a flooding period, repeating to introduce the biogas slurry when the liquid level decreases due to evaporation and infiltration, stopping introducing biogas slurry when the flooding period is over, then naturally drying or ventilating, integrating the small land pieces when the water content of the soil reaches 15-25%, and plowing the soil and combining with base fertilizers.