Research conclusions:Based on the analyses of the reason, harm and distortion characteristic of the earth surface crack, and guided by the principle of "prevention and putting aside", the overall adaptive plan of adjusting the rail gradientand using adjustable frame slab railwas adopted alongwith taking comprehensive technicalmeasures, such as partial reiforcemen,t remaining clearance in advance, trearmentstep by step, using flexible jointandwaterproofing after construction of structure. So the problem ofXi'an subway passing through the earth surface crack zonewaspreliminarily solved by doing so and this research resultwaswidely applied in Line?and LineòofXi'an subway.