Songyahu Tunnel is located in the connection section between high waterlevel zone and low waterlevel zone with complex stress conditions and high landscape design requirement. In order to meet the traffic requirement and surrounding environment requirement, the crosssection modes of mined tunnel at lake shore are introduced; the crosssection scheme of acrylic roof and that of sidewall glass are compared and the shapes of tunnel entrance/exit are selected by means of qualitative analysis and quantitative analysis. Meanwhile, the stress distribution of lakecrossing tunnel is analyzed by means of finite element method; and the antisliding, antitilt, waterproof and drainage and environmental protection of the tunnel are described too.