Sectional type stirring head of air supply stirrer

The present invention discloses a sectional type stirring head of an air supply stirrer, which comprises a main shaft and stirring blades, wherein the main shaft comprises a first shaft body and a second shaft body; a first ventilation hole is formed in the center of the first shaft body, and a plurality of air outlets communicated with the first ventilation hole are formed in the outer wall of the first shaft body around the axis; a second ventilation hole is formed in the center of the second shaft body, the multiple first shaft bodies are sequentially and concentrically arranged from top to bottom and detachably connected in a sealed mode, and the first shaft body and the second shaft body located on the bottommost layer are concentrically arranged up and down and detachably connected in a sealed mode. Each stirring blade comprises a blade main body internally provided with a blade channel in a penetrating mode, the outer wall of each blade main body is provided with a plurality of air supply holes communi