A winch bar is provided for use in combination with a strap winding winch for flatbed trailers. The bar has a rotatable link member at one end thereof which is provided with a hook portion adapted to interface with the apertures of the hub on one end of a reel of the winch. Upon the hook engaging the apertures, the bar can be rotated at a safe distance from the truck bed in order to rapidly, safely and securely rewind the strap onto the winch reel.