Affected by geological conditions,environmental factors,railroad construction is difficult,especially when encountering complex geological conditions,its tunnel construction is the focus of construction management,the formation of a full understanding of the conditions and requirements of tunnel construction,combined with the construction schedule and other reasonable development of the construction program,in order to improve the efficiency of the construction,construction quality,and to achieve the expected level of construction.The article analyzes the complex geological conditions of the railroad tunnel construction problems,as well as related construction technology points,to provide practical reference.