Abstract：In order to reveal the necessity and feasibility of promoting“lotus root-crayfish”highefficiency
ecological farming technology，this experiment adopted expert interview，typical investigation，
paired comparison and trial calculation analysis，etc. research methods to construct technical and economic
effect measurement indicators，and conduct economic evaluation on this technology from 3 aspects，
including economic benefit，ecological benefit and social benefit．The results showed that in 2019，the total
cost per 667 m2 of“lotus root-crayfish”high-efficiency ecological farming technology increased 409.67
RMB than that of single lotus root planting pattern．The rate of increase reached 9.84%．The output value
increased by 4 713.71 RMB．The increase rate was 85.21%．When the price of crayfish is lower than 23.40
RMB · kg-1，the net profit of lotus root-crayfish high-efficiency ecological farming technology is less than
that of planting lotus root alone．It was suitable to plant lotus root alone．In addition，this technology had
a significant effect of reducing chemical fertilizer application，thus pushing industry the green development
forward，broadening distribution channels for product and effectively reducing business risk．
