Environment-friendly air draft structure for oven

The utility model discloses an environment-friendly air draft structure for an oven, which relates to the field of ovens and comprises an air inlet cover, an exhaust pipe is mounted at the top end of the air inlet cover, a filter cotton layer is arranged on one side in the exhaust pipe, and a limiting component is arranged in the exhaust pipe. Through the arrangement of the material cleaning assembly, when impurities on fan blades need to be cleaned, a user only needs to start an electric push rod to enable a telescopic rod to contract so as to pull a material cleaning piece to rotate, when the material cleaning piece rotates to be in contact with the bottoms of the fan blades, the user closes the electric push rod and starts a motor, and the motor works to drive the fan blades to rotate; in the rotating process, impurities on the surfaces of the fan blades can be scraped away by the material cleaning pieces, then the impurities are prevented from being attached to the fan blades all the time, the cleaning ef