Abstract: In order to improve the productivity in different agroforestry systems in coast area.The nutrient dynamic characteristic in three types of typical agroforestry model,namely,the model of Ginkgo biloba leaf utilization(A),the model of Ginkgo biloba leaf and fruit utilizationcrop(B) and the model of Ginkgo biloba wood utilizationcrop(C),commonly practiced in the coast area in Jiangsu province,were studied by analysing the budget of nutrient in plant and soil,and their rates of recycling.The results were as follows:Maxium store of nutrients is estimated for each model:646.605 kg/hm2 in B,644.926 kg/hm2 in C and 278.616 kg/hm2 in A.About 86.8% to 99.5% of the annual retention in three models is contributed in annuals by crops.Soil nutrient distribution in each model is also studied.In general,the nutrient content(ρ) of organicmatter(O.M),totalnitrogen(T.N) and availablephosphorous(A.P ) is ρB>ρA>ρC,the content of K is ρA>ρC>ρB.Meanwhile,B has the highest coefficient of variation about O.M,T.N and A.P in top layer soil,which is up to 42.4%,46.5% and 74%,K is distributed evenly.The nutrient distribution in the soil profile shows slowly down from the top layer to bottom layer but each layer has different conditions in different seasons.Potassium has the highest rate of nutrient recycling which is up to55.26%,but the mean rates of nutrient recycling are 45.61% and 53.59% in B and C,which is significantly higher than A.The total store of nitrogen is highest in B and lowest in A,but phosphorus and potassium are ρA>ρB>ρC.The common characters in each model are that O.M,T.N,A.P are poor and availablepotassium(A.K) is rich in the soil.Therefore,it is necessary to strengthen entreecrop combinations and increase the amount of manure and phosphorus for nutrient equilibrium of systems.