Abstract: Secoiridoid compounds are important marked compounds in Olea L., in particular, oleuropein has some pharmacological activities definitely. This paper reviews the plant origin, chemical structure, physico-chemical characteristics,and pharmacological activities for secoiridoid compounds in Olea L.plant. The processing technology of olive leaves extract and analytical approach for oleuropein are proposed, which are foundation and useful for active components such as oleuropein to be processed and applied rapidly in China.