The structural crosssection survey of Metro tunnels is an important step in track laying. The conventional survey method has such disadvantages as huge site workload, huge indoor workload, complex indoor data processing and low data calculation efficiency. For the purpose of improving the survey efficiency and minimizing the instrument cost and the labor cost, total station is installed at the control point of the Metro tunnel, the coordinates of each feature point on each structural crosssection of the Metro tunnel are measured by means of 3D coordinate survey method, and the deviations in the structural crosssections are calculated by means of C# programming language. The application of the mentioned survey method shows that, due to the application of the survey method, the site workload is reduced and the efficiency of the indoor data processing is improved. The paper can provide reference for similar projects in the future.