The invention relates to a fiber plasterboard production process and device. The production process is particularly suitable for a fiber plasterboard high-speed production line. The method mainly comprises the steps of burdening and stable material supply, plasterboard forming, preheating curing and fixed-length cutting, drying, dry board treatment and packaging storing. Full-process production from burdening to finished product warehousing storing can be achieved, the matched production device is designed special for the high-speed production line, the device comprises a burdening and stablematerial supply machine, a forming machine, a preheating curing and follow cutting machine, a drying machine, a dry board treatment device, and a packaging storing device. The whole device is high incapacity and high in automation degree.