The invention relates to a rail-craning trolley-frame boring technology. The rail-craning trolley-frame boring technology includes the steps that for a trolley frame of which heavy plates in a wheel box of the trolley frame are arranged on the inner side, two heavy plates are welded at the corresponding position of the outer side of the wheel box of the trolley frame, and phi 40 mm through holes are formed in a face plate and a bottom plate of the wheel box of the trolley frame with a magnet drill or an air drill, and are formed in crotch opening lines of tracks of the trolley frame and consistent in upper and lower position; foundations are fixed on cement ground, jig frames are arranged on the fixed foundations, the trolley frame is horizontally arranged through jacks, the whole is divided into a wheel-plate-face machining allowance line, a wheel-plate boring machining center line and a datum line; four mattress plates are laid on the jig frames, numerical-control plano determinate-beam boring-milling machines are fixed on the mattress plates, and the trolley frame is bored. The rail craning trolley-frame boring technology has the advantages that the machining quality of components can be effectively improved while production efficiency is improved to a large degree, refurbishing losses are effectively decreased, and production cost is reduced.