Pole-climbing robot

The invention discloses a pole-climbing robot. An upper elastic claw device is elastically abutted against two sides of a driven cam; a lower part elastic claw device is elastically abutted against a curve external edge of a driving cam; the upper part elastic claw device and the lower part elastic claw device are controlled to alternatively conduct clamping actions via changes of the sizes of the external edge of the driving and driven wheels; a displacement reference point is provided for the other elastic claw device by the alternated elastic claw device; a crank drives the upper and lower elastic claw devices to alternatively move upward to achieve stroke changes; further the driving cam is a parallel-connected cam formed by a first driving cam and a second driving cam, so a clamping period of the lower part elastic claw device is the same as a pushing period of a second crankshaft; the upper elastic claw device can be ensured to finish upward displacement; and with cooperation among the driving cam, the driven cam and the stroke changes, actions of clamping, expanding, lifting and pushing of the pole-climbing robot can be finished through only one power mechanism.