Soil-improvement type microbial fertilizer and preparation method thereof

The invention discloses soil-improvement type microbial fertilizer and a preparation method thereof. The soil-improvement type microbial fertilizer is prepared from, by weight, starch, corn bran, cottonseed hulls, a microbial agent, glycerinum, ammonium bicarbonate, magnesium sulfate, turf, peat soil, rare earth nitrate, milk vetch straw, shell powder, borax, potassium nitrate, calcium superphosphate and a defined amount of water. If a certain type of crops are planted for a long time, deficiency of a single element in soil can be caused, the soil is prone to hardening, and the content of organic matter and the content of microorganisms are low; by means of the fertilizer which has the property of soil improvement and is prepared through the microbial fermentation technology, soil quality improvement is facilitated, all elements can be balanced, a certain water and fertilizer retention effect is achieved, subsequent management and fertilizer application amount are greatly reduced, the fertilizer is rich in microorganisms beneficial to the soil, and organic matter in the soil can be decomposed and utilized better.