The invention discloses an automatic vending machine. The automatic vending machine comprises a cabinet body, a goods storage unit, a supplying and conveying unit, goods placement racks and a main control unit. The goods storage unit is connected with the goods placement racks through the supplying and conveying unit; the supplying and conveying unit is arranged on the cabinet bodies and used forconveying goods between the goods storage unit and the goods placement racks; the goods placement racks comprise racks, conveying chains and goods taking ports in the middles of the front side walls of the racks; the conveying chains are rotatably arranged and are used for conveying trays which contain the goods to the goods taking ports. According to the automatic vending machine, the goods are placed on the trays, and the trays can move along on annular chains so that the goods in the trays at different positions of the vending machine can be conveyed to the goods taking ports through the chains; the stability of chain conveying is good, the goods are not easy to clamp, meanwhile the goods taking ports are formed in the middles of the goods placement racks, consumers take the goods conveniently, technical deficiency of a traditional vending machine is overcome, and the automatic vending machine has the advantage of high practicability.