A wheelchair power-assisted wheel is arranged on a wheelchair. The wheelchair power-assisted wheel includes a substrate axially connected with the wheelchair. A power-driven wheel is arranged on a lower surface of a front part of the substrate and touches the ground. A power provider is arranged on an upper surface of a back part of the substrate and electrically connected with the power-driven wheel and provides power to the power-driven wheel whereby the power-driven wheel moves against the ground. The present invention is convenient for a sitter to move on a rough road or to move uphill. The power-driven wheel of the wheelchair power-assisted wheel moves against the ground without idling, so as to improve driving efficiency, which is more helpful in moving the sitter.一種輪椅動力輔助輪，其係設置於輪椅，且輪椅動力輔助輪包含一與輪椅相軸接的基板，一動力驅動輪則係設置於基板的前側下表面並可接觸地面，及一能量供應器係設置在基板的後側上表面，並電性連接動力驅動輪及提供能量至動力驅動輪，以供動力驅動輪轉動，於地面上移動時，能量供應器會提供一壓力至動力驅動輪，以使動力驅動輪緊貼地面移動。本創作可以便於乘坐者移動於崎嶇不平的道路或是上坡，因為輪椅動力輔助輪中的動力驅動輪緊貼地面移動而不空轉，以使驅動效能提高，更有助於乘坐者移動。
