Abstract: Due to influence of objective factors such as geological conditions,construction technology,construction progress,certain construction errors are unavoidable during the metro construction. But sizable errors would lead to insufficient line interval or metro station gauges. To properly adjust alignment and slopes so that line interval and metro station gauges could meet the requirements for safe operation is an imperative goal for line design during urban rail transit construction phase. Taking the phase 1 construction of Lanzhou Metro Line 1 as an example,the cause for limit value violation is analyzed,line adjustment ideas are proposed and design solution for alignment and slope adjustment is summarized.