Polyamino acid type compound microbial organic fertilizer for crop planting and preparation method of polyamino acid type compound microbial organic fertilizer

The invention discloses a polyamino acid type compound microbial organic fertilizer for crop planting and a preparation method thereof, and belongs to the technical field of organic fertilizers. The polyamino acid type compound microbial organic fertilizer comprises the following components in parts by weight: 20-30 parts of modified biochar, 150-200 parts of animal waste, 20-30 parts of sodium humate, 1-2 parts of a compound microbial agent, 10-15 parts of mineral powder and 10-20 parts of modified polyglutamic acid. By adding the complex microbial inoculant into the organic fertilizer, the fermentation efficiency and the decomposition degree of the organic fertilizer can be improved, the soil fertility can be improved, the charcoal and the polyglutamic acid are modified, the competitive adsorption performance of the soil on the charcoal and the polyglutamic acid is improved, the fixing effect of the soil on the glutamic acid is reduced, and the soil fertility is improved. Therefore, the bioavailability of c