The invention discloses a powder beverage puffing machine, which comprises a main body, a conveyor belt is arranged inside the main body, a material inlet and a material outlet are connected to the main body, a first automatic door is arranged on the material inlet, and a second automatic door is arranged on the material outlet , the upper end of the main body is provided with a microwave generator and a vacuum pump, a sliding sleeve is provided in the main body, a slideway is opened on the sliding sleeve, a screw is provided in the sliding sleeve, a first rotating motor is provided on the main body, and a slider is provided in the sliding sleeve , the lower end of the slider is provided with a support rod, the lower end of the support rod is provided with a support plate, the support plate is provided with a mounting plate, the mounting plate is provided with a roller, the mounting plate is provided with a second rotating motor, and the roller is provided with a scraper , the drum is provided with a first scraping bar and a second scraping bar. The present invention lays the raw material on the conveyor belt from the feed port, and then closes the first automatic door, and the vacuum pump pumps out the air in the main body, and the microwave generator heats and expands, and the first The scraper bar and the second scraper bar turn the raw material back and forth, and the scraper scrapes the raw material evenly, so that the raw material is heated evenly to ensure the puffing quality.