Drying system is the core of the whole production line and it affects the quality and the energy consumption of the products. It has interior multi-layer coiler heat releasing type, external finned heat exchanging type, and hot air direct drying type. According to the airflow direction, it has longitudinal airflow type, transverse airflow type, and longitudinal, transverse combined airflow type. And it also can configure waste heart recovery system under customer’s demand. Inside of the dryer, there are various regulation and controlling mechanisms to stabilize the temperature and airflow of each layer freely, thus it guarantees the quality of the gypsum board, and reduces energy consumption.