Abstract: In order to understand efficiency of modern agricultural development in Ankang City, four indicators of agricultural input were selected, including total investment in pollution control, investment in agricultural fixed assets, cultivated land area, total rural labor resources, and two output indicators of agricultural gross output value and agricultural per capita production value in Ankang City from 2009 to 2020．BCC model in data envelopment analysis（DEA）model was used for efficiency analysis．Results showed that, comprehensive efficiency of agricultural input and output in Ankang City was only effective at DEA in 2020．But since 2009, overall overall efficiency has shown a listing trend．From input redundancy rate and output insufficiency rate, it could be seen that there was basically no phenomenon of output insufficiency in total agricultural output value of Ankang City．Except 2020, total investment in pollution control, agricultural fixed assets investment, cultivated land area, and total rural labor resources in other years were redundant to varying degrees, and unreasonable input structure caused DEA to be invalid．