Abstract: ObjectiveConsidering the economic and social impact,the technical and economic efficiency of the 22 large-scale agricultural modern demonstration areas in Guangdong was comprehensively calculated to provide theoretical reference for improving the operational efficiency of Guangdong agricultural modern demonstration zone.MethodAc-cording to the serious difference of economic and social environment in each demonstration area,a SFA model was con-structed to eliminate the influencing factors of output variables. Empirical estimate study was made on technical and eco-nomic efficiency of 22 large-scale agricultural modern demonstration areas.ResultIn developed areas of Guangdong Province,about 40% of technology efficiency of the agricultural modern demonstration areas declined with a large drop, that of several cities fell to about 0.5. The technology and economic efficiency of less developed and underdeveloped areas increased,among which the increase in pure technical efficiency in less developed areas led to an increase in the overall technical economic efficiency. The rise of pure technical efficiency and efficiency of scale in underdeveloped areas led to an increase in the overall technical and economic efficiency.ConclusionThere are large differences on technology effi-ciency in agricultural modern demonstration areas in Guangdong Province. Economic and social factors have great im-pacts on the efficiency of the demonstration areas. The future agricultural modern demonstration areas need innovative operating mechanism,strengthening financial capital investment,adjusting the input of various elements,strengthening the management and building a classification assessment system.