The Indosinian period in China is characterized by significant tectonic deformation and magmatic activity, leading to major changes in the tectonic pattern of the North China Craton. The Ordos basin, known for its stable geological conditions, has preserved extensive stratigraphic records, providing critical insights into the basin‘s evolution during the Indo- China movement. This study integrates data from 10 regional seismic profiles, 105 wells, and 28 outcrops to provide a detailed description of the types, distribution, evolution, and genesis of the Indosinian unconformities. This multi- faceted analysis incorporates well logs, seismic data, and outcrop observations. Our findings reveal the following: ① Indosinian unconformities are characterized by distinct lithological changes, basal conglomerate deposition, alterations in log values (AC and GR), and strong amplitude reflections on seismic data. Four distinct types of unconformities were identified: High- angle (Ⅲ), low- angle (Ⅱ), parallel (Ⅰ2), and parallel erosion (Ⅰ1). Parallel unconformities dominate the central basin, transitioning to low- angle unconformities in the south and high- angle unconformities in the north. ② The unconformity is extensively present in the western and central regions of the North China Craton and has experienced four stages of evolution. This resulted in the development of a low- angle unconformity between the Zhifang and Tongchuan Formations, as well as between the Yanchang Formation and Jurassic polygenetic unconformity. ③ A compressional tectonic setting along the northern and southern margins of the North China Craton, coupled with a dry, seasonally rainy climate, facilitated the development of truncation, onlap, and erosion unconformities. These processes ultimately resulted in the formation of angular unconformities in the south and polygenetic unconformities in the north. This analysis supports the hypothesis that the Indo- China movement triggered two distinct phases of regional unconformities. Polygenetic unconformities resulted from the synergistic effects of intense extrusion, regional uplift, and a subsequent shift to warm, humid climate.