The invention relates to a power construction tool, in particular to a climbing rod safety assisting device. The climbing rod safety assisting device is simple in structure, convenient to process and high in safety. The device comprises a safety belt, a pair of foot buttons and a pair of assisting components, and the pair of assisting components are arranged up and down and connected with the safety belt and the pair of foot buckles respectively; each assisting assembly comprises an arc-shaped supporting rod, a pair of vertical rods, a pair of telescopic mechanisms, a pair of rollers and a spring, wherein the pair of vertical rods are arranged in parallel and vertically arranged at the two ends of the supporting rod respectively, the pair of telescopic mechanisms are symmetrically arranged, the pair of telescopic mechanisms are arranged on the vertical rods in a one-to-one correspondence mode, the pair of rollers are symmetrically arranged and arranged on the telescopic mechanisms in a one-to-one correspondence mode, and the spring is connected between the pair of telescopic rods, and the safety belt is detachably connected to the supporting rod; the foot buckles correspond to the vertical rods one to one, and movable hooks of the foot buckles are connected with the vertical rods. The device is convenient to operate and reliable in action.