The paper presents cross-fault comprehensive geological profiling method on buried faults based on field geological investigation. The analysis mainly depends on information such as geomorphologic surface of the same formation on both sides(quaternary)which demonstrates certain vertical height difference or horizontal discontinuity caused by fault movement and the opposite direction of elevation and formation. The paper also determines the active age and moving characteristics of the fault. The paper analyzes the applicable conditions and influencing factors of the method,points out that the complete quaternary development at the site under research is the key to cross-fault comprehensive geological profiling method. Finally,the application of the method on the Ruichang-Wuning fault is compared with the traditional buried fault method research,and the results are consistent,reliable and practical.