Abstract:In order to explore the corresponding models of the area—elevation integral values (HI) of the Lianfeng and Zhaotong—Ludian fault zones to the development of the geomorphology in the tectonic active areaMethods:Based on ASTERGDEM data, the catchment areas of Lianfeng and Zhaotong—Ludian fault zones are extracted, and the area—elevation integral values of subbasin basins in this area are calculated. Combined with the characteristics of field profile, historical earthquakes, fault structure and activity, the tectonic geomorphological features and dynamic mechanism of Lianfeng and Zhaotong—Ludian fault zones are discussed. Results:The extracted slope and relief profiles across the Lianfeng Fault and the Zhaotong—Ludian Fault show that the slope and relief of the Jinyang Fold Uplift area west of the Jinsha River vary drastically, and reach a maximum at the Jinsha River, passing through the Lianfeng Fault. The Zhaotong—Ludian fault began to decrease, and reached the lowest value in the Ludian Basin, and then began to increase when it entered the Weining fold fault uplift area, but the slope and undulation were still smaller than the Jinyang fold fault uplift area. The geomorphic type is obviously controlled by faults, and the uplift terrain affected by Lianfeng fault and Baogunao—Xiaohe fault constitutes the western boundary of Ludian Basin. The HI value of the basin in the middle and lower reaches of the Jinsha River has a good consistency with the regional geomorphic uplift and fault distribution. The juvenile landform area is small, scattered between the Lianfeng fault and the Zhaotong—Ludian fault, and most of the areas belong to the mature stage (Fig. 4b). The high- value area is roughly consistent with the strike of the fault, while the area where the fault passes shows a relatively low- value area, revealing the control effect of tectonic activities on the development of landforms. Conclusions:① Except Ludian basin, the geomorphological development stage of most areas in the study area is in the adult stage. ② The area—elevation integral value (HI) of the study area is mainly controlled by tectonic activity, and the erosion resistance of lithology and river system play a local or secondary role. ③ The response of area—elevation integral value (HI) to different tectonic uplift intensity areas in the study area is different: in the strong tectonic uplift area, the HI value reflects the combined action of strong tectonic uplift and erosion in the catchment basin; in the tectonic uplift weakening area, HI value reflects the common result of slow tectonic uplift and sedimentation.