The invention discloses a method for improving drought resistance of paddy rice, alfalfa and Bermuda grass through low-salt induction treatment. The method comprises the following steps: A, planting: fertilizing, deeply ploughing and leveling a seedling land, fertilizing base fertilizers, preparing the land before sowing, sterilizing soil with ferrous sulfate, and leveling a bed surface; growing seedlings of paddy rice: firstly culturing seedlings in a certain farmland; cleaning alfalfa seeds, carrying out coating treatment on the seeds before sowing, ventilating, transmitting light and carrying out field management; carrying out lawn planting on Bermuda grass with two methods of seed sowing and rhizome propagation, and sowing seeds in late spring and early summer; B, seedling management: watering in seedling early period; and C, low-salt induction treatment: continuously pouring sodium chloride solution with low concentration for a given period on paddy rice, alfalfa and Bermuda grass seedlings in growth stage. The method is easy to implement, simple and convenient to operate and quick to take effect, the drought resistance of plants is improved during a short period, the crop yield during seasonal drought or at arid areas is improved, and the ecological benefits and economic benefits of lawn vegetation conservation and water and soil conservation are achieved.