A machine-room-less elevator counterweight traction device comprises a main frame; the bottom of the main frame is fixed with a counterweight frame which is internally provided with a counterweight iron; the main frame is provided with an appliance component, an installing cabinet of a safety device and a shaft; the right side of the main frame is provided with a driving device I which comprises a motor I, a motor II, a reducer I, a reducer II, a gas spring, a movable ejector rod, a rotating arm plate III, a rotating arm plate IV, an idler wheel I and an idler wheel II; and the left side of the main frame is symmetrically provided with a driving device II which has the same structure with the driving device I. The device causes the traction device and the counterweight to become one and can provide more available space for a hoistway.