Abstract: TEG dehydration is an important technology for natural gas exploitation. The developmental tendencies of TEG dehydration process were discussed in this article. Recently inert gas stripping is the most popular measure to concentrate TEG and can improve the purity of TEG to 99.20%-99.98% which correspond to the water dew point depression range of 55-83 ℃ for dry gas. The improved Drizo process can reduce the mass concentration of water to lower than 1×10^-6, the dehydration efficiency may reach that of molecular sieve adsorption process. The TEG dehydration process can reduce BTEX/CO₂ emission and recover aromatic, which will decrease CAPEX and OPEX also. Especially, Drizo process is suitable for FLNG engineering. At present brand-new equipments and materials are increasingly utilized in TEG dehydration unit, such as high-efficiency structured packing, electric gear pump, energy exchange pump and welded plate heat exchanger etc..