The work is devoted to the study of the physico-chemical characteristics of wood smoke used in the production of hot and cold smoked fish. The dispersion composition of wood smoke is determined depending on the temperature in the smoke formation zone and the excess air coefficient. The content of the main smoky components and polyaromatic hydrocarbons (PAHs) in the particles of the dispersed phase of wood smoke of various sizes has been established. A model of changing the dispersed compo-sition of smoky smoke in the process of hot smoking is proposed. Theoretical calculations based on the proposed models of changes in the dispersed composition have been experimentally confirmed. Physico-chemical and statistical research methods were used in the work.