Continuous roller hearth furnace is one of the important equipment in thin slab continuous casting and rolling production line. It plays a connecting role in function. On the one hand, it heats the slabs under various temperature conditions to the temperature required by rolling process. Generally speaking, the tapping temperature required by rolling process is 1150 ± 10 ℃, which is much higher than the general step The temperature difference value of ± 30 ℃ which can be achieved by entering the furnace lays a foundation for the production of ultra-thin hot strip products proposed by the production line of Tangshan Iron and Steel Co., Ltd.; on the other hand, roller hearth furnace also plays an important buffer role in the whole process.