Abstract: Jingbian gas field is rich in deep coal rock gas resources and is a key area for coal rock gas development in the Ordos Basin. Compared with vertical directional wells, horizontal wells have better development benefits and are an important technical means for developing deep coal rock gas. However, the NO.8 coal seam in the region has a thin thickness (4-10 m), with the development of bright coal, semi bright coal, semi dark coal, and dull coal. The lithology is complex, the heterogeneity is strong, and micro structures are developed, which makes it difficult to guide the geological direction of horizontal wells and the coal seam drilling encounter rate is low, seriously restricting the development effect of horizontal wells. To solve this problem, a comprehensive technical breakthrough has been carried out in the fields of geology, earthquake, well logging, and mud logging. A horizontal well geological guidance technology has been proposed, which focuses on constructing a three-dimensional geological model to select and deploy well locations, accurately comparing multiple marker layers for precise targeting, accurately determining geological risks, and real-time optimization and adjustment. The main process of this technology is: combining well logging and seismic analysis to carry out high-precision 3D geological modeling, optimizing the deployment of well locations in favorable development areas, and optimizing the design of horizontal well trajectories. Based on 7 sets of marker layers including Maoergou limestone and No.7 coal seam, carry out fine stratigraphic correlation and control well inclination angle to accurately target. Identify various rock types, divide coal seam cycles, and accurately determine top and bottom out by integrating gamma, gas logging, drilling, and element logging parameters. In areas with gentle and complex structures, 10 measures have been developed to address geological risks such as top-down, bottom-up, high angle upward/downward cutting, low angle upward/downward cutting, encountering upper interlayers during drilling, and encountering lower interlayers during drilling, in order to ensure the smooth implementation of horizontal wells. By applying the geological guidance strategy of this horizontal well, the coal seam drilling encounter rate of 7 coal rock gas horizontal wells in the pilot test area of Jingbian Gas Field reached 90.2%, and the implementation effect was significantly improved.