The invention discloses an unloading and guiding work trolley for long steel rails. The work trolley is hooked with a loading and unloading car, and long steel rail recovery and stretching during release are completed. The work trolley is formed by a cross beam assembly, a wheel pair assembly, steel rail guiding devices and a transverse movement oil cylinder. The cross beam assembly serves as a foundation structure platform of the work trolley and is of an all-steel welded box-type structure. The wheel pair assembly capable of running along rails is arranged below in a suspended manner. The two ends of the platform are each provided with one set of steel rail guiding device moving along guide rails. The steel rail guiding devices are driven by the transverse movement oil cylinder arrangedon the cross beam assembly to achieve transverse movement. The cross beam assembly is provided with a hooking seat plate detachably hooked with a connecting mechanism and a drive mechanism of the loading and unloading car. According to the unloading and guiding work trolley, the trolley does not need to carry out regrouping or tripper car extraction on a unit, work efficiency is improved, steel rails can be transversely located accurately, the situation that the ends of the steel rails directly smash to the ground, consequently, the steel rails are damaged, or sleepers, fasteners and other components are crushed is avoided, and the steel rails can be discharged in the center and can also be discharged on the outer sides of rails.