Conventional oil and gas exploration and development of major oilfields in China has entered the middle and late stages, and the increase and stability of production mainly rely on complex fault, thin reservoirs and the remaining edge and bottom water reservoirs etc., making it more difficult to control the drilling trajectory of horizontal wells. The self-developed azimuthal multi-frequency (AMR) resistivity measurement system while drilling uses a pair of orthogonal horizontal antennas to measure the zx and zy components simultaneously on the basis of conventional resistivity measurement. This design can detect the formation boundary during both rotary steering and conventional screw processes. The use of random multiple initial value gradient inversion algorithm has achieved rapid data processing. Based on the random multi-initial gradient inversion algorithm, a single/double interface inversion model is established for fast data processing while drilling. Field application of multiple horizontal wells with conventional screw drilling tools in Shengli Oilfield. Through the comprehensive geosteering method based on stratigraphic correlation to identify the reservoir, use AMR to detect and invert the interface in real time, and combine the seismic data to pre-adjust the drilling trajectory. The target layer is accurately entered into and the horizontal section is continuously tracked, which significantly improves the reservoir drilling rate and promotes the development of the remaining oil in the old eastern oilfield.