The description of the information modeling system for the distribution of hot blast and natural gas through the tuyeres of a blast furnace is presented. The developed system is distinguished by taking into account the main physical and chemical laws and ongoing processes in the control object. It is based on the method of determining the blast flow through the air tuyeres, using the thermal power of the flow passing through the tuyere and the value of the heat removal taken from this tuyere. As a result of the calculation, the system determines the main parameters of the blast mode of the blast furnace and the parameters of individual tuyere hearths, including the theoretical combustion temperature, the speed of the blast from the tuyere, the kinetic energy of the blast, the length of the oxygen and carbon dioxide combustion zones of the tuyere hearth, and others. The required consumption of natural gas through the blast furnace tuyeres is calculated, which will ensure the maintenance of the theoretical combustion temperature in the blast furnace tuyeres at a given level in the design mode. The architecture of the software is described, the characteristics of the modules are given and its operation is illustrated. The developed software can be used by the technological personnel of the blast-furnace process to improve the efficiency of blast-furnace smelting.