Based on the observational data,the effect of enhanced UV-B radiation on the growth of wheat is investigated and the ecological feature of the plant community productivity is calculated under the condition fo UV-B enhancement.The results show that this effect is mainly displayed in delaying plant growth,reducing leaf area,tiller and number of flowering,shortening plant height,decreasing the number of green leaves,the weight of dried stuff,leaf and ear.In addition,it also affects the productivity of wheat such as its community growth rate,comparative growth rate,leaf area index,daily leaf accommulation,net assimilation rate,all of which are decreaed significantly in the middle and late stages of its growing period.As a result,the number of wheat plant per unit area,the ear number of single plant,the grain number per ear and the weight of 1000 grains are reduced substantially,which influences the yield product of biology and economy of wheat community.