Abstract: C-E NATCO heat medium heater's combustion control system is mainly composed of three subsystems, e.g. heat medium flow control subsystem, fuel oil flow control subsystem correcting heat medium out-heater temperature and combustion-supporting wind control subsystem revising oxygen content rate. The in-flow rate and the outlet temperature of the heat medium are kept stable through these subsystems to meet the requirement of production process, and meanwhile the combustion process is controlled in optimum area to reduce heat loss in smoke venting and raise heat efficiency of the heat medium heater.