A shock-absorbing suspension device includes a mounting rod mounted on a wheeled vehicle frame, a wheel rod mounted on a vehicle wheel axle and forward of the mounting rod, a counteracting member pivotally mounted on the mounting rod and having upper and lower linked ends disposed forward of the wheel rod, upper and lower linking bars coupling the upper and lower linked end to the wheel rod to thereby form a four-bar linkage mechanism, a cantilever arm extending forward from an upper end of the mounting rod to terminate at a bearing end, and a force transmitting member coupled with the four-bar linkage mechanism to thereby minimize the impact of shock to the mounting rod.