A drying machine, characterized by comprising: a box body, a first partition plate being provided in the box body, the first partition plate being located in front of a rear wall of the box body, and a drying cavity and a first accommodation cavity being respectively located on two sides of the first partition plate, the first accommodation cavity being defined between the first partition plate and the rear wall, a fan wheel being provided in the first accommodation cavity, and a rotation axis of the fan wheel being perpendicular to the first partition plate and the rear wall, a first air inlet being formed in the first partition plate, a second air inlet being formed in the rear wall, and the first air inlet and the second air inlet each being axially opposite to the fan wheel; when the fan wheel rotates, an airflow inside the drying cavity is suitable for entering the first accommodation cavity through the first air inlet under the action of the fan wheel and then flowing into the drying cavity, and an airflow outside the drying machine is suitable for entering the first accommodation cavity through the second air inlet under the action of the fan wheel and then flowing into the drying cavity, so as to realize the inner circulation and the outer circulation of air by means of one fan wheel; characterized in that a fan wheel housing is provided between the first partition plate and the rear wall, the fan wheel is arranged in the fan wheel housing, and an air channel is defined between the fan wheel and the fan wheel housing, and when the fan wheel rotates, the airflow in the drying cavity sequentially flows through the first air inlet and the air channel and then flows into the drying cavity, and the airflow outside the drying machine sequentially flows through the second air inlet and the air channel and then flows into the drying cavity. a box body, a first partition plate being provided in the box body, the first partition plate being located in front of a rear wall of the box body, and a drying cavity and a first accommodation cavity being respectively located on two sides of the first partition plate, the first accommodation cavity being defined between the first partition plate and the rear wall, a fan wheel being provided in the first accommodation cavity, and a rotation axis of the fan wheel being perpendicular to the first partition plate and the rear wall, a first air inlet being formed in the first partition plate, a second air inlet being formed in the rear wall, and the first air inlet and the second air inlet each being axially opposite to the fan wheel; when the fan wheel rotates, an airflow inside the drying cavity is suitable for entering the first accommodation cavity through the first air inlet under the action of the fan wheel and then flowing into the drying cavity, and an airflow outside the drying machine is suitable for entering the first accommodation cavity through the second air inlet under the action of the fan wheel and then flowing into the drying cavity, so as to realize the inner circulation and the outer circulation of air by means of one fan wheel; characterized in that a fan wheel housing is provided between the first partition plate and the rear wall, the fan wheel is arranged in the fan wheel housing, and an air channel is defined between the fan wheel and the fan wheel housing, and when the fan wheel rotates, the airflow in the drying cavity sequentially flows through the first air inlet and the air channel and then flows into the drying cavity, and the airflow outside the drying machine sequentially flows through the second air inlet and the air channel and then flows into the drying cavity.