Abstract: This paper reviews the most active research fields on chemical interaction among organisms：(1)allelopa-thy among plants, which is widely applied in agriculture and horticulture,(2)biochemical interaction be-tween plants and insects,(3)biochemical interaction among insects and(4)biochemical interaction among mammals and between mammals and plants.n addition,some new fields such as chemical communica-tion among fish and raptiles,chemical interaction between insects and microorganisms and between plants and microorganisms,and future research trends such as chemical adaptation of organisms to their envi-ronments,effects of environmental chemicals on organisms and biochemical interaction among organisms on community and ecosystem levels are also introduced.