The invention discloses an automatic meal selling machine which comprises a machine body. A machine door is arranged on the machine body and is hinged to the machine body, a cashier system and a man-machine interactive system are arranged on the machine door, a storage system, a heating system, a shipping system, a remote monitoring system and a control system are arranged in the machine body, the storage system, the heating system, the shipping system, the remote monitoring system and the cashier system are all electrically connected with the control system, a refrigerator is arranged in the storage system, the refrigerator is fixedly connected with the machine body, the heating system comprises a microwave heater, and the microwave heater is fixedly connected with the machine body. Food is stored in the refrigeration environment, when consumers purchase the food, the refrigerated food can be automatically conveyed into an internal high-power microwave oven through the system to be heated, then the food is conveyed to a food fetching opening, the quality guarantee period is greatly increased, the selling time of a lunch box is guaranteed to a great degree, and therefore the mode of selling the box lunch food with people is changed into the mode of selling the box lunch food without people.