Multi-segment nozzle and cooking oven using same

The present invention provides a multi-segment nozzle and a cooking oven using the same. The multi-segment nozzle includes a first nozzle segment having a first air inlet and a first opening, wherein inner diameter of the first nozzle segment gradually decrease from the first air inlet to the first opening; a second nozzle section provided with a second air inlet and a second opening, wherein the inner diameter of the second nozzle section is gradually reduced from the second air inlet to the second opening, and the inner diameter of the second air inlet is larger than that of the first opening; a base section provided with a third air inlet and a third opening; a first rotating shaft element pivoted at the joint of the first air inlet and the third opening; and a second rotating shaft element pivoted at the joint of the second air inlet and the first opening, wherein at the beginning, at least one of the first nozzle section and the second nozzle section is configured to form an oblique angle relative to the