Areca seed baking machine

The utility model relates to the technical field of seed baking machines, and discloses a betel nut seed baking machine which comprises a box body, an air suction pipe, a fan, an air spraying pipe and a conveying mechanism, the box body is of a sealed structure, a feeding port is formed in the top of the box body, a discharging inclined table is arranged at the bottom of the box body, and gas interlayers composed of double-layer plate-shaped structures are arranged on the two sides of the box body. The gas interlayer is used for guiding gas to flow from the top of the box body to the bottom along the side wall, and a heat exchange device is arranged in the gas interlayer. Through mutual cooperation of the air suction pipe, the fan, the air spraying pipe and the gas interlayer, gas in the box body is sucked into the pipeline from the top, is heated in the gas interlayer and then is sprayed into the bottom of the box body, and the heated gas stably and uniformly flows upwards under the action of airflow and exp