The Zhongjiang-Huilong structural area in the western depression of the Sichuan have are many difficult factors for drilling engineer, including complex formation pressure system, thin gas layers, poor rock drillability, frequent sand-shale interbeds, large formation inclination angle ,and so on. In the vertical section, it is difficult to control the deviation and azimuth, and the drilling efficiency is low. Also it is difficult to land in horizontal section from the inclined shaft section with multiple trajectory adjustments. According to the geological structure characteristics and the wellbore trajectory influencing factors, the wellbore trajectory control method is studied from the aspects of bottom hole assembly, wellbore structure design. Through the well in this block, a feasible well trajectory control method is summarized, which provides technical reference for the optimal and fast drilling of horizontal evaluation wells in this block.