Reducing the production cost of the monocrystalline silicon battery is the key to improve the benifits of the photovoltaic industry. During the equal-diameter crystal pulling process, the sectional heating can reduce the output power of the heater and lower the energy consumption of the heating system. Based on the analysis of the heating area and energy consumption in the pulling process of monocrystalline silicon, this paper proposes to optimize the heating system of single crystal furnace via subdividing the heater structure and improving the heating circuit. Two-stage heating and three-stage heating (i.e., Scheme 1 and Scheme 2, respectively) models were designed in the experiment, and they were imported into the finite element simulation software for simulation. The results show that the two-stage heating model possesses a greater effect on the pulling process, and the three-stage heating counterpart shows a smaller effect on the pulling process, which can better ensure the stability of the pulling process. The energy consumption calculation shows that the energy consumption of the former is reduced by 6.98%, while the energy consumption of the latter is reduced by 9.49%. Therefore, three-stage heating is more conducive to reducing the production cost of photovoltaic enterprises.