The invention mainly provides a spoke assembling device for rims. The spoke assembly device for rims comprises a rim body and a plurality of spoke sets. Each spoke set includes a fixing seat, a fixing part, at least one combining part and at least one spoke, the fixing seats are arranged on the inner periphery of the rim body and are provided with a set of holes for the fixing parts to penetrate through, the fixing parts are rod-shaped and are provided with at least one positioning hole radially for the combining parts to penetrate through, one end of each combining part is fixedly assembled with each spoke set, and the other end of each spoke is fixedly connected with a hub. By the aid of the parts, the fixing parts can rotate relative to the fixing seats, the combining parts can sway relative to the fixing parts at an angle so that the spokes can be regulated to a preset angle, the fixing seats are easy to form, high in acceptance rate and convenient to assemble, assembly efficiency is improved effectively, cost is reduced, and the whole spoke assembling device for rims is convenient and practical.