The utility model relates to the technical field of electric power training devices, in particular to a wire pay-off device for a practical training device. The wire pay-off device comprises a drawer, a tray, a shaft lever and a supporting frame, an opening is formed in the front side of the drawer, a lifting handle frame is arranged at the opening, a bearing block is arranged on a bottom plate of the drawer, a bearing is mounted in the bearing block, the shaft lever is vertically arranged, the lower end of the shaft lever is connected with the drawer through the bearing block, the tray is horizontally arranged on the shaft lever and the upper portion of the bearing block, four universal wheels are uniformly distributed on the lower portion of the tray, the supporting frame is hinged to the center of the upper portion of the lifting handle frame, a locking device is arranged at the hinged joint, a U-shaped opening groove is formed in the other end of the supporting frame, when the supporting frame rotates to the upper portion of the drawer and is parallel to the bottom plate of the drawer, and the opening groove of the supporting frame sleeves the outer side of the upper end of the shaft lever, namely, the upper end of the shaft lever is positioned in the opening groove. The wire pay-off device has the advantages that the wire pay-off device is convenient to operate, and wires are prevented from being disorderly arranged and mutually wound when drawn.