Abstract: The olivine lithium iron phosphate (LiFePO↓4) has the potential to be a new commercial cathode material for lithium ion battery due to its abundant resources，low cost，non-toxicity，environmental benignancy，high theoretical capacity，good thermal stability and excellent cycling performance.The synthetic methods of LiFePO↓4，such as high temperature solid state reaction method，sol-gel method，microwave radiation method，hydrothermal method and co-precipitation method，were summarized.The characterization techniques of LiFePO↓4，such as IR，SEM，XRD and electrochemical property analysis etc.were introduced in detail.