The invention provides a battery container, a film packaging battery and manufacturing methods thereof. The battery container is provided with a container body. The container body is formed by a limited film with metal foil and welded layers, wherein the peripheral walls of the container body, one pair of opposite concave walls is connected with one pair of opposite walls in such a manner the welded layers on two side end surfaces of the pair of opposite concave walls are welded with the welded layers on two side edges of the pair of opposite walls. The pair of opposite concave walls is shaped by drawing so as to enable the welded layers of the laminated film to be projected to an accommodating part. The outer surfaces of the pair of opposite concave walls form concave parts, and the pair of opposite concave walls are erected by bending of a square bottom part. The pair of opposite walls are erected by bending of the bottom part.