This paper studied the coupling model of material flow and energy flow in the production process of lead
smelting enterprises, and established the mathematical model for material flow and energy flow to resolve optimization
problems. From the point of energy flow, the paper analyzed three kinds of energy flow changes which have an effect on
the enterprise products. Through calculation and analysis, it has been found that there is 38.42% energy-saving potential
in this enterprise. Separately from the material flow and energy flow angle, the paper put forward five aspects suggestions
to reduce the energy consumption of the enterprise products.