Abstract: Located at the critical geological node for the Belt and Road Initiative, Qamchiq tunnel on Angren-Pap railway in Uzbekistan is the longest tunnel in Central Asia. The tunnel is located in the highly seismic area of IX degree, with very complicated geological conditions. In order to obtain accurate geological survey data to guide design and construction, the survey and design enterprise from China implements the Uzbekistan′ s national standards for the project, and formulates the technical standards and principles for survey, which is recognized by the two countries. On the basis of the full collection of the data on the studied area, a comprehensive survey method focusing on geological survey and mapping and combined with the geophysical exploration, drilling, in-situ test and laboratory test is established, the engineering geological and hydrogeological conditions of the tunnel are identified, and accurate geological data are obtained, thus guaranteeing the safe and smooth implementation of the project.