Abstract: Based on variation of growth parameters and development parameters, foraging growth pattern and resource allocation of clonal Leymus chinensis population were studied. Relationships between the law of resource allocation and microhabitat quality of the population were analyzcd in terms of mathematic methods. Foraging behaviour of this population was also discussed. The results showed that foraging growth parttern of resource alloation could be described using allocaion function models in which ψ=0.5, μ=l.0,Tr=7, and Ts = 2.