To improve the accuracy of judging tight reservoirs and timely transmit the lithology of the formation around the bit during drilling. This paper presents a near-bit gamma imaging LWD system based on electromagnetic transmission technology and its application in 2888–3505 m well section (105.5–122 °C) of Fuling tight reservoir. The LWD system is con-sisted of near-bit gamma imaging sub, screw and data receiving sub. Under drilling conditions, the formation gamma parameters around the borehole wall are scanned and measured dynamically in the unit of one sixteenth of the circumference. The measurement parameters are recorded and sent across the screw to data receiving sub by electro-magnetic transmission technology. Besides, the application of dynamic high-precision gamma scanning imaging technology provides the gamma images in multiple depth of formation. The use of this LWD system in Fuling tight reservoir indicates that it can provide accurate formation dip and gamma images. The field application shows that this system could image and stably measure parameters of deviation, azimuth and near-bit gamma in tight reservoir, and transmit measurement data in real time. It makes it possible to guide geosteering drilling and adjust the drilling trajectory in time, thus improving the drilling ratio of high-quality reservoirs by 97.92%. In addition, 16-sector gamma images provide more accurate data for formation evaluation and reservoir boundary analysis of Fuling tight reservoirs. The near-bit gamma imaging LWD system has been provided successfully used in Fuling tight reservoir. Dynamic high-precision gamma scanning imaging technology helps the wide application of near-bit gamma LWD tool in tight shale reservoirs, and provides data support for real-time decision of geosteering.