Organic light emitting diode (OLED) exhibits such properties as light,thin,flexible,low-consumption,area source,and fast response,which will be novel generation plane display and solid luminance source in future.However,two main technical bottlenecks hold back the development of OLED,which are rather lower efficiency and worse stability relative to liquid crystal display or light emitting diode (LED).In recent years,it has been identified that device performance of OLED shows close relationship with structure and properties of OLED interface.In this paper,the significance of OLED interface research to device performance is illustrated firstly.Then the recent research progress of anode/organic layer interface,organic layer/organic layer interface, cathode/organic layer interface and inner interface in organic layer are emphasized in detail,combining with our new research achievements.At last,the outlook of OLED interface research is prospected.