The Wuhai Basin is located along the northwestern edge of the Ordos Block， with its eastern boundary marked by the Zhuozishan West Piedmont fault （ZWPF）， a fault active during the Holocene. As urban expansion increasingly approaches this fault zone， gaining a detailed understanding of ZWPF activity has become increasingly important. Using 12.5 m resolution digital elevation model data， this study extracted and analyzed geomorphic parameters—including the relief degree of land surface， channel steepness index， stream length-gradient index， and hypsometric integral （HI）—on the western flank of Zhuozishan Mountain using ArcGIS and MATLAB. Combined with field geological surveys， the study examined the spatial distribution characteristics of these geomorphic indices and their implications for fault activity. The results show that the ZWPF displays clear segmentation in tectonic activity. The northern segment， divided by the Xinwusu trench， shows relatively weaker tectonic activity， characterized by lower geomorphic index values. In this segment， fault rupture often follows the existing fault plane， creating prominent fault scarps and triangular facets. In contrast， the southern segment shows stronger activity， with higher geomorphic indices， a broader fault zone， and a series of fault stepovers， with the fault located closer to the basin side. Both the northern and southern segments show higher HI values in the tectonic mountains and lower values in the basin areas. Drainage basins in the northern segment reach HI values up to 0.691 in tectonically uplifted zones. The overall HI distribution highlights the significant impact of the ZWPF on vertical crustal movements within the study area.