The invention relates to the technical field of construction machines, in particular to a position-changing pole climbing mechanism. The position-changing pole climbing mechanism comprises a clampingmechanism, a power element and a position-changing mechanism, the clamping mechanism is composed of mechanical claw devices arranged at the two ends of a sliding pole, the position-changing mechanismis in sliding connection with the bottom of the sliding pole, and the power element is used for controlling the mechanical claw devices to be lifted vertically and relative sliding of the sliding poleand the position-changing mechanism. The position-changing pole climbing mechanism is simple in structure and flexible and reliable to operate, and the demand of a pole climbing robot for position changing during pole climbing is effectively met; an anti-corrosive coating with a sucking disc structure enhances the property of resistance to corrosion of the mechanical claw devices, meanwhile, theclinging force of the mechanical claw devices and a pole body is increased, the pole climbing robot is prevented from falling from the pole body, accordingly, the safety of operation is improved, andthe damage rate is decreased; by designing a sensor, the safety can be guaranteed, and maintaining costs are lowered.