Dawenkou Basin is rich in rock salt resources which are deeply buried. The overlying strata are loose mudstones and sandstones of Paleogene, which are easy to soften in water and difficult to drill through. Shandong Feicheng Haijing Salinization Co., Ltd. implemented a one million ton/year brine recovery and transmission project with seven units of brine supply wells, each with depth of about 3000m. Well intersection requires high-precision kick-off and continuous build-up. This paper introduces a field case where the key drilling technology for well was used for well intersection, and the MWD system for directional trajectory control with detailed description on how to drill in rock salt formation, the application of mud motor drilling tools, kick-off from the fixed-point and other key technical measures so as to provide reference for brine supply well intersection drilling.