Portable winch crank for flatbed trailers

An improved winch crank assembly for use on typical flatbed trailers whereon cargo is secured using flexible straps is described. The present invention permits the rapid winding of the straps onto the winch and reduces the time required for winding the straps by tenfold or more. The present winch crank assembly comprises a portable crank assembly wherein a single crank can be used to wind the straps onto a plurality of winches on a single trailer. In addition, the portability allows the user to conveniently carry the crank for use on other truck trailers.