Preparation method of hydrolyzed amino acid suspended fertilizer

The invention discloses a preparation method of a hydrolyzed amino acid suspension fertilizer, and belongs to the technical field of suspension fertilizers. The preparation method comprises the following steps: modifying montmorillonite, modifying humic acid, compounding and mixing. In the compounding step, modified humic acid is placed in N, N-dimethylformamide, then modified montmorillonite is added, after uniform stirring, triethylamine and glutaraldehyde are added, ultrasonic treatment is carried out, after ultrasonic treatment is finished, the temperature is raised to 90-94 DEG C at the speed of 1.4-1.6 DEG C/min for reaction for 4.3-4.7 h, after reaction is finished, the temperature is lowered to the room temperature, and washing and drying are carried out, so that the modified montmorillonite modified humic acid is obtained. A montmorillonite/humic acid compound is prepared; the hydrolyzed amino acid suspended matter fertilizer prepared by adopting the method disclosed by the invention is high in suspe