The invention provides a power rope for mountaineering and a manufacturing method thereof. The manufacturing method of the power rope for mountaineering includes the steps of 1), pile-doubling and twisting nylon fiber to obtain rope-core twisted yarn; 2), pile-doubling the nylon fiber to obtain rope-skin yarn; 3), weaving the rope-core twisted yarn obtained in the step 1) and the rope-skin yarn obtained in the step 2) to obtain a rope; 4), subjecting the rope obtained in the step 3) to hot water bath treatment to obtain a power rope product after drying and shaking the rope. In the method, heat treatment medium and process is innovated; unified hot water bath treatment of the power rope makes the power rope have high strength and high elastic performance; the power rope not lower than those required by EN (European Norm) and UIAA (Union International Alpine Association) standards can be obtained, which provides another set of production scheme for the production and processing of the power rope.