Abstract: Chemical absorption is currently the most mature technology for CO₂ capture from flue gas. However, this technology hasn't been put into commercial application due to the high regeneration energy. Biphasic solvent is a promising solution as it can significantly reduce the regeneration energy. This paper reviewed three processes using the biphasic solvent for CO₂ capture and their energy-saving principle. Two types of amine blended and physical-chemical biphasic solvents were summarized. The biphasic behaviors, phase separation mechanism, and regeneration energy of these biphasic solvents were analyzed and compared. Quantitative analysis on the effect of increased viscosity of the biphasic solvent on the lean/rich heat exchanger was conducted. Research progress on the volatility, degradation, and corrosion of the biphasic solvent was introduced. Based on current research status and the deployment of CO₂ capture from flue gas, the future direction of the biphasic solvent was discussed.