The study aims to evaluate the economic efficiency of the three-rice-crop and the twolotus-crop model in Thap Muoi District, Dong Thap Province. The study data were collected from 158 farmers (98 households producing three rice crops per year, 60 remaining households plant two lotus crops per year) by stratified random sampling. The research result shows that both models above bring economic benefits to farmers. However, the two-lotus-crop model is less costly, the selling price is stable and tends to increase. Moreover, it takes advantage of idle labor in the family, so its economic efficiency is higher than the threerice-crop model.