The utility model discloses a right-angled dual-roll measuring scale which comprises an outer shell, a main scale, a secondary scale, a hand band and a laser ruler, wherein the main scale and secondary scale comprise fixed shafts, scale bands and scale heads; the two fixed shafts are positioned at the top left corner and bottom right corner of the outer shell; the scale bands are wound on the fixed shafts; the tail ends of the scale bands are provided with the scale heads; the laser ruler is arranged at the bottom left corner of the outer shell; the bottom left corner of the outer shell is provided with a right-angled structure; the hand band is arranged on the outer shell by virtue of a handbag hole reserved in the outer shell. The right-angled dual-roll measuring scale can be used for overcoming the defects of high measurement workload and large errors in a traditional method and is capable of conveniently, rapidly and efficiently judging the deviation between a pile position and pit excavation.