Changliangshan Tunnel is an electric heavy—haul double—track railway tunnel of Shuozhou—Huanghua Railway. During surveying，we took a fairly good effect through ap-plying technology of geological comprehensive survey. This paper, at first，combined the en?gineering geological feature with the hydrogeological feature of tunnel area，and then set forth the content, working procedure, main proceeding and the effect of the comprehensive survey technology. Through the technology practised at Changliangshan Tunnel, several ba?sic experiences are summed upin final.