The moisture control in paper making process and the energy consumption per ton of paper are two important control indicators for quality and cost control. In domestic paper mill, the way of paper drying mostly adopts traditional steam drying for long multi-cylinder paper machine. Because the technology personnel cannot accurately control the pulp flow and the pressure difference, the steam dryer tends to have poor drainage, higher energy consumption per ton of paper, resulting in difficulties in product quality and cost control. It is urgent to perform technical reform in the process of industrial upgrading. Through the development of Distributed Control System(DCS), various types of measuring sensor and control scheme are designed, implementing precise control on the heating system for 1760 mm/300 m long net multi-cylinder paper machine, which achieves the goal of quality control and energy saving.