The invention relates to a surface coating drying technology and a special device for a wind power tower, belonging to the technical field of wind power device manufacture. The technical scheme is that: the wind power tower is transported into a profile modelling drying room by a movable roller bracket, the inner wall of the drying room is in a profile modelling structure and the shape of the inner wall of the drying room is matched with the shape of the tower, the tower rotates during the drying process, and far infrared heating is used for controlling indoor temperature and heat preservation time for surface coating drying from outside. The invention changes the traditional surface coating drying method of wind power towers (tower posts), has the advantages of energy saving, high efficiency, environment protection in the surface drying process of the wind power towers (tower posts), enables the coating quality to meet higher requirement, satisfies all-weather construction environment and conditions, and is easy for disassembly and secondary installation and use; and the process method has the advantages of low input, adaptability to different operation environments and all-weather construction, convenient operation for workers, good coating quality, shortened production cycle and improved occupancy utilization rate.