The analysis of the ventilation function of the lungs was carried out against the background of different severity of the course of chronic obstructive pulmonary disease, with different severity of nicotine dependence. It was found that an increase in the degree of nicotine dependence is directly proportional to an increase in bronchial resistance and a decrease in the elasticity of lung tissue. The degree of nicotine addiction to a greater extent changes the rate indicators, which increase with treatment.