Draught fan provided with automatic lubricator

The utility model discloses a draught fan provided with an automatic lubricator. The draught fan comprises an air guide shell and an impeller, wherein the impeller is located in the air guide shell; a rotating shaft is installed in the impeller; the automatic lubricator is arranged at the position, close to the impeller, of the rotating shaft; the rotating shaft is sleeved with the automatic lubricator. The draught fan is simple in structure; lubricating oil can be automatically added to the impeller at any time through the automatic lubricator; the draught fan is convenient to operate and good in lubricating effect, saves working time and improves working efficiency. Meanwhile, the draught fan guarantees the aseptic environment of a workshop and product quality.