Pollen fossils, stable isotopes, framboid pyrites, and major elements were analyzed in the Yanchang Formation from core ZH2 to investigate the response of the Carnian pluvial event in the southern Ordos basin. Two pollen fossil assemblages were identified from bottom to top: (Ⅰ) the Punctatisporites- Verrucosisporites- Osmundacidites assemblage and (Ⅱ) the Asseretospora- Apiculatisporis assemblage. The geological dates of these assemblages correspond to the Middle Triassic (Ladinian) and the Late Triassic (Carnian),respectively. The Zhangjiatan shale, located in the lower part of pollen assemblage Ⅱ, exhibits enriched total organic carbon (TOC) content and a negative organic carbon isotope shift of 4. 88‰. Concurrently, the framboid pyrite index indicates that this layer formed in anoxic conditions. Additionally, high values of Al2O 3/MgO and the chemical index of alteration (CIA) indicate a high- temperature, humid climate with enhanced chemical weathering. These characteristics collectively demonstrate that the Carnian pluvial event had a significant impact on the Ordos basin. Further analysis shows that these indicators can be subdivided into four distinct intervals within the Zhangjiatan shale, each marked by high temperatures, humidity, anoxia, and organic carbon enrichment. These intervals represent four climatic fluctuations associated with the Carnian pluvial event in the Ordos basin, designated as CPEⅠ, CPEⅡ, CPEⅢ, and CPEⅣ.