As the development of unconventional oil and gas resources progresses, precise wellbore trajectory control technology has become essential for enhancing extraction efficiency and safety. This paper conducts an analysis of magnetic steering technology, Measurement While Drilling (MWD), and Rotary Steerable Systems (RSS), emphasizing the significant role of magnetic steering in the in-situ conversion Process (ICP) of shale oil. By comparing different technologies, it is evident that magnetic steering excels under complex geological conditions, achieving measurement accuracies up to 2% and is particularly suited for precise control in dense well pattern and complex well configurations. This article details the developmental history, current status, and cutting-edge advancements of wellbore trajectory control technology. Magnetic steering, in particular, through real-time and precise measurement of relative positions between wells, effectively prevents well collisions, substantially improving the safety and economic benefits of drilling operations. During the in-situ conversion process of shale oil, this technology ensures the drill bit precisely follows the predetermined trajectory, achieving high-accuracy trajectory control with inter-well distances less than 50 m. The paper also discusses technical innovations and application cases both China and internationally, highlighting that due to its outstanding adaptability and reliability, magnetic steering has become the preferred technology for the efficient development of shale oil. Through a systematic comparative analysis, this study offers innovative technological pathways for shale oil in-situ conversion, aiming to advance the progress and practical application of unconventional oil and gas development technologies.