The invention discloses a rapid replacer for secondary wires of a transformer substation terminal board. The rapid replacer is characterized by comprising a base, a clamp, an upper cover, a driving rotating component, a driven rotating component and a sliding wire clamp component. The rapid replacer can be used for a common transformer substation terminal board through matching of a clamping hook and the clamp; a wire hook has high flexibility, can clamp the secondary wires with different diameters and can penetrate through densely distributed secondary wires; the travel of the sliding wire clamp can be adjusted by adjusting the matching positions of movable slider clamps with a drive belt. The rapid replacer has the advantages that the secondary wires corresponding to terminals can be accurately clamped and can be rapidly pulled out and accurately recovered in a linked manner by loosening or tightening of the terminal screws in a matched manner, besides, whether the terminals are charged is verified, the checking efficiency is improved, safety of fieldwork is guaranteed, labor of workers is saved and the rapid replacer is convenient to use and carry.