The invention relates to an automatic candy vending machine comprising a rack, a candy storage and selection unit, a bag storage and opening unit, and a bag sealing unit. The candy storage and selection unit comprises a plurality of candy storage barrels, a separator plate sub-unit arranged under the candy storage barrels, a push rod sub-unit connected with the separator plate sub-unit, a control unit used for controlling the push rods to move, and sensors arranged under the candy storage barrels to detect the decrements of weights of candies. The bag storage and opening unit is arranged under the candy storage and selection unit and is used for storing packing bags and opening the packing bags, comprising a bag storage frame used for holding the packing bags, a horizontal slide table, a vertical slide table and suckers arranged on the horizontal slide table and the vertical slide table. The bag sealing unit is arranged under the bag storage and opening unit and used for sealing the packing bags, comprising a hot sealing and cutting machine used for sealing the bags and a conveyor belt used for conveying the candy packing bags. Compared with the prior art, the machine can meet the requirement for autonomous food selection of customers and can complete weighing and packing work quickly with high working efficiency.