China has implemented important economic policy of reforms during the1980s and1990s.And there was an urgent need to restructure the economy to improve macroeconomic per-formances.Drastic economic measures like abolition of prices subsides,devaluation of exchange rates,liberalization of international trade,and privatization of public enterprises characterize most of the reforms.In recent years,it is increasingly recognized that such fundamental eco-nomic changes may have important effects on the resources especially farmland.Given that,from mid-1990s,China begins to enforce dynamic balance of farmland area(DBFA)to satisfy the demand of land use for agriculture and non-agriculture sectors.The possibility of DBFA was pre dicted in research area of the Yangtze River Delta by modeling the driving forces of farmland change.According to the results of modeling,it is possible to realize DBFA in2005,and about 9.12%shortage of farmland area compared with the protected area in2010in the Yangtze River Delta.The possibility is different for11cities in the research area.It is possible to realize DB-FA in Taizhou City of Jiangsu and Huzhou City of Zhejiang.It is difficult to realize DBFA in cities of Nantong,Zhenjiang and Changzhou of Jiangsu Province and Jiaxing City of Zhejiang Province.It is more difficult to realize DBFA in cities of Nanjing,Wuxi,Suzhou and Yangzhou of Jiangsu Province.For Shanghai City,it is almost impossible to realize DBFA,and the short-age rates of farmland area are respectively20.01%and33.95%in2005and2010.The research results also show the cost is high if DBFA should be realized.Based on the analysis of DBFA policy system,some suggestions on reforming the policy implementation system have been given at last.