The purpose of this paper is to clarify the paleocurrent direction and sedimentary characteristics of Cretaceous Qingshuihe formation (K1q) in Chepaizi area. Based on the analysis results of structural maturity and compositional maturity, this paper makes a more detailed exploration on the sedimentary environment and the source of clastic materials in the sedimentary period of K1q. Based on the seismic and drilling data, the paleocurrent direction is analyzed by using paleogeo-morphology and seismic reflection structure. The analysis of rock slices of core samples shows that the content of rock debris and feldspar in sandstone reservoir in the study area is high, the content of quartz is low, the weathering degree of samples is deep, the particle sorting is medium to good, the roundness is subround to subangular, the cementation type is pore cementation, and the structural maturity of sandstone is medium to low. The results of particle size analysis demonstrate that the suspension transportation of fine particles is the main transportation mode in the study area, and the rolling transportation is less. The paleogeomorphology shows that the terrain of the study area is high in the north and low in the south. The seismic profile indicates that low angle imbricate progradation reflection is developed in the northwest and northeast. On the basis of results, the following conclusions are obtained: the paleocurrent of K1q in Chepaizi area carried the northwest provenance into the northeast and south, experienced medium and long-distance transportation.