Blade change auxiliary system of wind-power generator set

The utility model provides a blade change auxiliary system of a wind-power generator set, comprising a blade lifting beam and a winch. When a blade to be changed is taken off from an impeller of a tower frame, the blade lifting beam is arranged at the root of the blade to be changed, the lift rope of the winch is connected with the blade lifting beam and is gradually released so as to place the blade to be changed on an operation platform; and when a new blade is arranged on the impeller of the tower frame, the blade lifting beam is arranged at the root of the new blade, the lifting rope of the winch is connected with the blade lifting beam and is gradually retrieved so as to lift the new blade from the operation platform to a blade mounting hole of an impeller hub and mount the new blade on the blade mounting hole. Through the blade change auxiliary system of the wind-power generator set, the blade can be replaced in space without dismantling the whole impeller, so that an operation space for changing the blade is reduced, and the cost and the time required for changing the blade are saved.