The invention discloses a device for providing power for a component on a rotating head sheave and method. Through diagonally arranging a left horizontal guide wheel and a right horizontal guide wheelbetween a left head sheave and a right head sheave, a spiral drum is arranged in the middle; when the left head sheave rotates forwardly and a left wire is wound on a left wire winding area on a lefthead sheave shaft, the spiral drum accordingly rotates forwardly, the left wire wound on the spiral drum is in a release state and a right wire is in a winding state, and the right head sheave and aright head sheave shaft rotate reversely and the right wire is released; and on the contrary, when the right head sheave and the right head sheave shaft rotate forwardly and the right wire is wound ona right wire winding area, the spiral drum accordingly rotates reversely, the right wire wound on the spiral drum is in a release state and the left wire is in a winding state, and the left head sheave and the left head sheave shaft rotate reversely and the left wire is released. Thus, the wire does not disturb normal rotation of the head sheave, the performance is reliable, the structure is simple, and the operation and the control are easy.