The machine can provide the dry wind with the low dew point of -50oC and satisfy many requsets of plastic production. The machine is controlled by PID micro computer to make the accurate temperature. The machine is equipped with the converse alarm function. The machine is equipped with the alarm function for abnormal wheel turning. The filter is installed on regeneration and drying pipelines to honeycomb and the clean of the dry wind. The machine is equipped with highly efficient condenser to ensure the lower temperature of the return air.