The utility model discloses an automatic vending machine, an automatic vending machine bottom plate and with relative both sides correspond left side board and the right side board of connecting respectively on the bottom plate, just bottom plate, left side board and right side board form a hatch opening that is used for supplying the thing business turn over jointly, the tray is established in the hatch opening for placing of goods, conveyor for transport the goods, a photoelectric detection system, a photoelectric detection system's light orientation set up or pass in the tray the region oftray top is located with the detection in the hatch opening have or not the goods in the tray, the controller, with a photoelectric detection system with conveyor communication connection, alarm device, with controller communication connection. The utility model discloses technical scheme can improve the function that automatic vending machine normally assembled the goods.