The invention discloses a method for lowering temperature and supplying oxygen for a fish pond, and aims to provide a method for lowering water temperature of the fish pond in summer and increasing oxygen supply. The method adopts a technical proposal that a pond provided with a sunshade is built in the fish pond and air is imported into the pond by an air pump in summer. The method for lowering temperature and supplying oxygen for the fish pond comprises the following steps: (1) building the pond in the fish pond; (2) providing the sunshade on the pond; and (3) importing air into the pond bythe air pump in summer. The technical proposal adopted by the method has simple operation; and the method for lowering temperature and supplying oxygen for the fish pond has low cost, is convenient to lower temperature locally and supply oxygen for the fish pond centrally, and improves survival rate of fishes.