The invention discloses a delivery system applied to small box-shaped article selling equipment, belongs to the technical field of self-help selling equipment and comprises a base as well as a storage device and a delivery device disposed on the base, wherein the storage device is located above the delivery device. Keys are that the delivery device comprises a straight line drive mechanism fixed on the base, a connecting plate fixed on an execution end of the straight line drive mechanism, a push block hinged to the connecting plate, and a torsion spring disposed between the connecting plate and the push block; the push block is driven by the straight line drive mechanism to move horizontally along a delivery channel to a delivery hole and move articles on the bottom layer of the storage device out from the storage device, the push block has a horizontal moving freedom degree of moving from the delivery hole to interior of the storage device along the delivery channel and a rotation freedom degree of avoiding the to-be-pushed articles on the bottom of the storage device under reverse driving of the straight line drive mechanism. The system disclosed by the invention has the advantages that the structure is simple and compact; the occupied space is small; and the storage devices with different sizes can be set on the base according to demands, so the articles with different specifications could be given out.