The invention relates to the technical field of soil improvement, in particular to a method for improving the soil property of a tobacco field. The method comprises steps as follows: (1) reconstruction of a soil
plough layer of the tobacco field; (2) application of an organic material; (3)
irrigation treatment; (4) application of base
fertilizer; (5) application of additional
fertilizer. With a reconstruction technology of the soil
plough layer, 0-20 cm soil is interchanged with 20-40 cm soil in the tobacco field, then, a large quantity of organic materials are applied, water is irrigated,
pyrroloquinoline quinone is applied in a matched manner,
inorganic fertilizer, particularly, multiple different
potash fertilizer is combined for application, accordingly, the content of
organic matter in soil can be increased, the soil
structural property can be improved, the bulk weight of the soil can be reduced, the
soil porosity can be improved, and the soil acidity can be reduced. The dosage ofinorganic fertilizer in a conventional cultivation method can be reduced, the available
nutrient, particularly, the content of available
potassium, of the soil in the tobacco field is increased, thephysicochemical properties of the soil are improved, and the microbial activity of the soil is improved.