The study of coal maceral from a basin- level perspective contributes to a deeper understanding of basin coal- forming mechanisms and overall basin evolution. Additionally, it aids in predicting resource distribution and planning the utilization of resources such as coalbed methane, coal direct liquefaction, and tar- rich coals. The Yan'an Formation in the Ordos basin is renowned for its abundant coal resources. Decades of exploration and research have yielded a wealth of coal maceral data, providing a solid foundation for basin- wide coal maceral studies. This research systematically collected and analyzed coal maceral data from the Yan'an Formation across the entire basin. Besides, detailed layered coal samples were obtained for vertical maceral analysis from various mines in the Ningdong, Shaanbei Jurassic, and Huanglong Jurassic coalfields. Both the collected maceral data and data from the layered coal samples show that the Yan'an Formation coals are characterized by the enrichment of inertinite, which is nearly equivalent to the vitrinite content. Vitrinite is mainly composed of collodertrinite, collotelinite, and telinite, with variations of homogeneous vitrinite and clustered vitrinite. The inertinite group consists mainly of semifusinite, fusinite, funginite, macrinite, micrinite, and inertodetrinite. The liptinite group is primarily composed of sporinite, cutinite, resinite, bituminite, and exsudatinite. Coal macerals exhibit a ring- shaped distribution pattern on the plane, with inertinite content decreasing and vitrinite content increasing from the basin periphery to the center. Vertically, inertinite content in the middle coal seam of the Yan'an Formation is relatively lower compared to the upper and lower coal seams. This pattern suggests a ring- shaped coal accumulation model controlling the accumulation of Yan'an coals, with the coal accumulation center completely separated from the sedimentary center. Coal peats away from the basin center experienced more oxidation, leading to an increase in the inertinite content, while the inertinite content decreases closer to the basin center.