The invention provides an improver for planting tobaccos in acidic and cadmium-contaminated soil. The improver comprises the following raw materials in parts by weight: 22-28 parts of quick lime, 35-45 parts of modified charcoal, 18-24 parts of shell powder, 2-5 parts of a microbial agent, 30-50 parts of bentonite, 12-20 parts of a silicon-calcium fertilizer and 50-60 parts of an organic fertilizer. The modifier for planting tobaccos in acidic and cadmium-contaminated soil is prepared from quick lime, modified charcoal, shell powder, the microbial agent, bentonite, the silicon-calcium fertilizer and the organic fertilizer, is applied as a base fertilizer, so that the acidity of polluted soil is effectively improved, the Cd mobility and the plant effectiveness in the polluted soil are reduced, the mobility of Cd is effectively reduced, and the adsorption capacity of the soil is improved.