The invention discloses an auxiliary wheel structure, and belongs to the technical field of bicycle auxiliary devices. The auxiliary wheel structure comprises pivot arms and adjusting components. Screw holes are formed in the pivot arms. The pivot arms are connected with a bicycle in a pivot mode. Each adjusting component mainly consists of screw teeth, a control element, a connecting rod and a rigid adjusting element. One end of each adjusting component penetrates through a screw hole through the screw teeth and is movably connected with each pivot arm in a sleeved mode, and the other end of each adjusting component is provided with an auxiliary wheel. The auxiliary wheel structure has the advantages of enabling a user to adjust in a gradual mode, and reducing dependence on the auxiliary wheel when the user is in a process of learning how to ride the bicycle.