The invention discloses a power assembly of a high-voltage cable stripper. The power assembly comprises a power control device, a gear speed reduction torque increasing device, and a manual control device. According to the invention, the power assembly is novel in structure, simple in operation, and high in working efficiency; less physical strength of an operator is consumed; switching of manualoperation and electric operation during working can be performed; the main transmission parts are gear transmission, so the reliability of the product is quite high; the main parts of a top rod deviceand a gear speed reduction device are made of plastic, so the power assembly has good insulation performance; and safety of the work is improved to the greatest degree.