The invention discloses a preparation method of an organic
amino acid water-soluble
fertilizer based on Chinese herbal medicines, and relates to the technical field of organic
amino acid water-soluble fertilizers. According to the technical scheme, the organic
amino acid water-soluble
fertilizer is characterized in that 50% of
camellia oleifera residues, 25% of
rapeseed cakes, 15% of local Chinese herbal
medicine (the ratio of fresh
abelmoschus esculentus, fresh fructus alpiniae oxyphyllae to seed shells of fructus amomi and the like is 5: 3: 2) and 8% of
bran serve as matrixes, 1% of light
calcium carbonate is added, then stepped
fermentation is conducted, and 1% of complex microbial inoculants are added in the
fermentation process according to needs; the step-type
fermentation is divided into a high-temperature period, a cooling period and a stable period, the 0-7th day of fermentation is the high-temperature period, the temperature is kept at 60-65 DEG C, and
pile turning is performed every day so as to activate thermophilic
bacteria in the
pile; the 8-14 days of fermentation is a cooling period, the temperature is kept at 45-50 DEG C, turning is conducted every two days, and the medium-temperature microbial inoculum is supplemented; and keeping the temperature at 35-40 DEG C in a stable period from the 15th day to the 30th day of fermentation, turning the
pile every week, and inoculating functional
bacteria. The
fertilizer has the effects of improving soil and preventing diseases.