Preparation method of municipal garden soil

A preparation method of municipal garden soil comprises the following steps: step S1, sorting household garbage and/or aged garbage in garbage sorting equipment; and screening out soil residue mass which contains abundant organic matters; step S2, drying the soil residue mass which is screened out and contains the abundant organic matters by a dryer, and sterilizing; step S3, standing and stackingthe sterilized soil residue mass which contains the abundant organic matters for several days to cooling; step S4, shredding and air-drying plant organic matters such as straws and tree leaves and animal dung; step S5, fully mixing the sterilized soil residue mass with the plant organic matters and the animal dung, and spraying an EM bacterium nutrient solution to carry out compost; step S6, monitoring the temperature of the compost, and carrying out biological decay and fermentation; and step S7, blending nitrogen, phosphorus and potassium inorganic fertilizers into the compost. The organicmatters in the garbage can