The invention discloses a fish pond building method, in particular to a building method of a simple flood-control fish pond in a rural area. The building method of the simple rural flood-control fish pond has the special aspects that: after a common fish pond is dug by a general method, the periphery of the fish pond is provided with a berm with the breadth of about one meter, a dam is built at the outside of the berm and a feed ditch is dug outside the dam, a diversion pipeline is arranged between the feed ditch and the fish pond, and a water inlet and a swallow port are both equipped with corresponding barring fish establishments. The flood-control fish pond designed by the method can prevent flood and can also adjust the water quality and increase the fish crop for fish breeders in rural areas, so the invention is favorable for fisheries production.