Nitrogen fixation process in organic fertilizer production and fermentation process

The nitrogen fixation process comprises the following specific steps: S1, controlling the temperature of a high-temperature fermentation period: controlling the fermentation temperature to be within 70 DEG C through a preparation system, when the temperature of a pile body is higher than 70 DEG C, immediately turning and throwing, cooling to about 55 DEG C, ensuring the activity and colonization of microorganisms in the fertilizer until the temperature is not increased any more, and stopping fermentation; the cooling trend is continued; s2, detecting the moisture of the organic fertilizer pile body: continuously detecting the moisture of the pile body in the fermentation process until the moisture is reduced to about 40% from 55-60% in the formula; s3, sampling and detecting the carbon and nitrogen ratio of the organic fertilizer pile; s4, after the temperature of the organic fertilizer is reduced to about 35 DEG C, the moisture is reduced to about 40%, and the carbon nitrogen ratio is reduced to about 18-20: