The invention discloses a technology for planting lotus roots in a fish pond. The technology includes the following steps that (1) germination accelerating is conducted, and breeding lotus roots are stacked for accelerating germination; (2) the planting density is controlled, the sowing quantity per mu is 200-250 kg, wide and narrow row spacing is used for seed arrangement, the wide row space is 2.5 m, the narrow row space is 0.4 m, the distance between plants is 0.6 m, and the number of required bud heads is 200-400; (3) planting is carried out, seed arrangement is conducted at the end of February and the beginning of March, all the plants between the rows are arranged to be in a quincunx shape, the bud heads on the periphery face inwards, the phenomenon that lotus whips are inserted into the periphery of the fish pond is avoided, the remaining rows also face one side, the bud heads are inserted in mud in the planting process, and the tips protrude out of the water surface; (4) membranes are covered; (5) the membranes are uncovered, after the first ten-day period of May, the membranes are uncovered, ridges are removed, water is poured till the depth of water is 10-15 cm, fish excrement of 2000 kg and urea of 17 kg are subjected to top dressing per mu, and foliage spraying of boric fertilizer of 2 kg is conducted per mu; (6) harvesting is performed. According to the technology, the whole planting processes such as germination accelerating, planting, membrane covering and fertilizer applying are systematically controlled, the bud ratio, the growth rate and the survival rate of the lotus roots are effectively guaranteed, the quality of the lotus roots is good, the yield of the lotus roots is high and economic benefits are good.