The invention relates to a tobacco fertilization method capable of conserving tobacco-planting soil. The tobacco fertilization method is characterized by comprising the following steps: a, fertilizing base fertilizer; b, transplanting; c, further applying seedling fertilizer; d, further applying potash fertilizer; and e, carrying out field management measures. By adopting the tobacco fertilization method capable of conserving the tobacco-planting soil, the volume weight, overall porosity, capillary porosity and aeration porosity of the soil are reduced, so that the capillary moisture capacity and moisture content of the tobacco-planting soil are increased, the quantity of microbes in the soil is increased, the pathogenic bacteria of tobacco bacterial wilt are reduced, and the yield, output value, average price and high and medium tobacco rate of tobacco are obviously improved.