Abstract: The arthropod community was divided into four kinds of function communities phytophages,predators,parasitorids and neutralities, by the standard of nutrition and hunting.The relative abundance of these function communities was calculated.The shifting trend of relative abundance of predators was similar to the phytophages. Therefore the predators were important natural enemy that influenced phytophages at each growth period.

Key words: field border length for irrigation, winter wheat, photosynthetic characteristics, dry matter accumulation and distribution, water use efficiency, yield.