The integration of the various techniques of geological survey has proved that Liujiabu fault is not a fault actually, but a northern boundary of the Qilihe syncline basin in Lanzhou city. In order to get the deformation of the shallow stratum along the Liujiabu fault, a set of observing system, which is suit for seismic reflection above one hundred meters, is used in the survey. There are four survey lines discussed in this paper, and we delineate the structure of the Qilihe syncline basin by analyzing the characteristics of the four seismic images. Comparison of the seismic images shows that the obvious physical differences are on two sides of the syncline structure, meanwhile, the intersection of Liujiabu fault and Shengouqiao fault is deformed greatly. This study suggests that the geological structure under the Lanzhou basin is quite complicated and the correct interpretation of seismic exploration is based on a correct understanding of the geological structure.