Terrigenous siliciclastic deposits have been found in the carbonate strata of the Permian Qixia Formation in the Shuanghui section, Wangcang area, northern Sichuan Basin, which has important indicative significance for the Permian Early Guadalupian paleogeographic evolution and oil and gas exploration of the northern Sichuan Basin.Methods: By means of sedimentology and zircon U- Pb chronology, the sedimentary environment and provenance conditions of siliciclastic rocks have been analyzed.Results: The sedimentary characteristics of the terrigenous siliciclastic rocks in the Qixia Formation indicate that they were formed in a coastal sedimentary environment, indicating that the area has experienced a short period of sea level decline. The petrological and morphological characteristics of zircons indicate that they have high compositional maturity and structure maturity. U- Pb dating results of detrital zircons show that their ages are mainly concentrated in the four peak ranges of 2600~2400 Ma, 1800~1200 Ma, 1000~700 Ma and 500~400 Ma, which reflects the complex provenance composition, and indicates that the clastic particles have undergone long distance transport or recycling. By comparing the zircon age spectrum, it is found that the zircon age distribution characteristics of the Qixia Formation siliciclastic rocks is similar to the Silurian—Permian siliciclastic rocks and Precambrian basement rock of the Yangtze block. Combined with regional tectonic evolution, it is believed that the Pre- Cambrian crystalline basement in the Yangtze Block is the initial source of detrital zircons, and the Silurian—Devonian System in the northern margin of Yangtze Block may provide direct provenance supply for the formation of the Qixia detrital rocks. The emergence of siliciclastic rocks in the Qixia Formation indicates that in the Early Guadalupian, due to the drop of sea level, local underwater uplift was briefly exposed to form an island or old land and suffered denudation, which provided the source for the formation of siliciclastic rocks. Based on the sedimentary environment and provenance conditions indicated by the siliciclastic rocks of the Qixia Formation, the paleogeographic pattern of the study area in the Early Guadalupian is restored.Conclusions: The discovery of terrigenous siliciclastic rocks of the Qixia Formation provides new evidence for revealing the Early Guadalupian geomorphic differentiation and paleogeographic pattern transformation in northern Sichuan Basin, and provides an important indication for the next oil and gas exploration in the area.