Yarn drying device

The invention aims to provide a yarn drying device which comprises an annular conveying belt. A feeding and discharging area is arranged at the left portion of the annular conveying belt. The portion of the annular conveying belt except the feeding and discharging area is a drying area. Longitudinal hot air blowing pipes are distributed above the drying area of the annular conveying belt. Yarn pulling mechanisms are uniformly distributed on the annular conveying belt. Each yarn pulling mechanism comprises an adjusting track arranged on the front side and the rear side of the annular conveying belt. A supporting column is arranged on each adjusting track. An installing column is arranged on each supporting column. Clamping blocks are arranged on the outer side of the top of each installing column. The clamping blocks of every two installing columns form a group to clamp yarn. As the annular conveying belt is arranged to arrange the yarn pulling mechanisms and convey the yarn, in the drying area, the hot air bl