Abstract: Experiments on a complex eco-agro-model: rice+sugarcane+fish+mushroom+vegetables,were carried out in Guangxi Karst Region in Southern China according to the principles of agroecology and the technologies of modern agriculture.The results showed that annual output per hectare reached 4.65t for rice,24.65t for sugarcane,0.77t for fish,15.50t for mushroom and 2.33t for vegetables with a total output value at 54411 Yuan,net income at 34935 Yuan.The ratio of output-investment was 2.79:1.The output value was 8.4 times higher than that of the controlled (double cropping of rice),and net income was 10.1 times higher than that of the controlled.