The invention discloses a method for improving the wave shape of edges of a thin container plate and belongs to the technical field of the steel rolling process. The method for improving the wave shape of the edges of the thin container plate comprises the steps that an edge heater is arranged at an inlet of a finishing mill and used for heating two side edges of an intermediate blank; an automatic control system is used for controlling the heating temperature of the edge heater; an edge shielding device is arranged on a laminar cooling manifold and used for controlling the cooling position of the edges of strip steel; the automatic control system is used for controlling the shielding position of the edge shielding device. By means of the method for improving the wave shape of the edges of the thin container plate, the problem that double-edge waves exist on rolled finished products can be effectively solved, the quality of the plate shape of the products is improved, and the yield of the products is increased.