Abstract: Research progress of low temperature electrolytes in Li-ion batteries，such as conducting lithium salt，organic solvent and additives is reviewed and analyzed. The electrochemical properties and low temperature performance of ethylene carbonate (EC) and propylene carbonate (PC) based organic solvent are presented and compared. In order to modify the electrochemical and low temperature properties of the two important organic solvents above，a few important methods are introduced. It can be concluded that the optimization of organic solvent and use of additives are effective means to improve the low temperature performance of organic liquid electrolyte. The development and application trend of low temperature electrolytes for Li-ion batteries are also discussed.