Due to the long horizontal section, large inclination angle, and high wellbore curvature of horizontal wells, the frictional force between the tubing and casing increases, resulting in the inability of the operating tubing to reach the target position and affecting the operation effect. Therefore, research on horizontal well drag reduction operation technology has been carried out. The technology aims to reduce friction and establishes a horizontal well drag reduction operation technology system from four aspects: theoretical calculation, process string, matching tools, and liquid agent system. Based on theoretical calculations, combined with suitable string combinations, drag reduction tools, and workover fluid, the insertion capacity of the horizontal well operation string is improved. This technology establishes a load calculation model for the operating column based on the on-site situation, and calculates a reasonable combination of columns; Research on integral joint tubing to reduce friction between the tubing and casing; Research hydraulic oscillator that induce axial vibration through hydraulic pressure to reduce sliding friction; Research on drag reducing workover fluid to form a smooth liquid film on the surface of the tubing and reduce the resistance of the tubing to enter. This technology has been applied on-site for 44 times in unconventional horizontal well development blocks in Jilin Oilfield. The effective rate of pre pressure perforation and post pressure flushing operations has reached 85%, which is nearly 20% higher than the previous conventional operation. It has saved operating costs of 903,700 yuan, increased crude oil production by 6300 tons, and increased production and efficiency by 507,800 yuan. Field applications have shown that this technology effectively improves the efficiency of horizontal well operations and the integrity level of the wellbore, providing technical support for the efficient development of shale oil horizontal wells.