The problem formulation for decision-making support during determining the parameters of the heating systems for hydraulic presses and its decomposition, based on the optimization problem of elements of the heating system, mathematical models of the functioning of the heating systems elements of hydraulic presses, is proposed. The structure of the decision-making support system for the parameters determination of the heating systems of hydraulic presses, the functions of its elements, information flows between them is determined. The information models for the information storage and processing on the initial data and the results of solved problems are developed.