The invention discloses an auxiliary bearing structure of a delivering robot. The auxiliary bearing structure comprises a mounting platform of the robot, wherein a plurality of vacuum sucking discs are fixed on the bottom surface of the mounting platform; supporting frames are respectively fixed on two sides of the mounting platform; each supporting frame comprises connecting parts in a shape likeChinese character 'ba'; vertical supporting parts are respectively formed at outer ends of the connecting parts; a horizontal bearing part is formed at the lower ends of every two corresponding supporting parts; positioning sleeves are respectively inserted and fixed at the lower ends of the supporting parts on the supporting frames in a sleeving manner; pipe sleeves are respectively formed on the outer walls of the positioning sleeves; a plurality of cutting grooves are formed in each pipe sleeve; each pipe sleeve is divided into a plurality of arc-shaped sheets by the grooves; taper pipe threads are formed in the outer wall of each pipe sleeve; locking sleeves are respectively in threaded connection with the outer walls of the pipe sleeve; bearing rods are connected between the supporting frames on two sides in an inserted manner; and two ends of each bearing rod are respectively inserted in the pipe sleeves of corresponding opposite two supporting frames. Through the adoption of the auxiliary bearing structure disclosed by the invention, the delivering robot can be assisted to bear the bottom of a cargo which cannot be sucked by the vacuum sucking discs, so that the deliveringdemands of the unmanned delivering robot are met.