Focused on some technique problems in the shallow seismic prospecting for active faults in urban area, research work on the high-resolution shallow seismic prospecting technique is taken across the Jinchengguan fault and the Liujiapu fault in Lanzhou basin. Both P- and SH- wave CMP reflection methods are used to find out the characteristics of active fault in the very shallow strata（ ≤50 m）. Those seismic profiles of the target area reveal the characteristics of tectonic deformation evidently, especially the SH-reflection profiles. In the paper, the key technical points such as data acquisition, data processing and profile interpretation are summarized by using HYC and SFXX survey lines as the examples. The result will be beneficial to further geophysical investigation for active faults in Lanzhou and other area.