The invention discloses an inflating assisting device. The inflating assisting device comprises a first strip-shaped bearing plate, a triangular notch is formed in one end of the upper surface of the first strip-shaped bearing plate, a bearing mechanism is arranged at the center of the upper surface of the first strip-shaped bearing plate, an inflating assisting mechanism is arranged on the surface of one side of the first strip-shaped bearing plate, a fixing mechanism is arranged on the lower surface of the first strip-shaped bearing plate, a water bottle hanging mechanism is arranged on the surface of the other side of the first strip-shaped bearing plate, an energy storage mechanism is arranged on the portion, located on the front side of the inflating assisting mechanism, of the upper surface of the first strip-shaped bearing plate, and a controller is arranged on the side surface of the first strip-shaped bearing plate. The inflating assisting device has the advantages of being simple in structure and high in creativity.