The invention discloses a method for overall seam welding of a container. The method specifically comprises the following steps that steel pretreatment and stamping are conducted, specifically, uncoiling is conducted on a steel coil, leveling on a flat plate is conducted, primary sanding and primary zinc painting are conducted, flat plate shearing and roller forming are conducted on a side plate,trimming deflashing and punching are conducted, flat plate shearing, bending forming, trimming deflashing and punching are conducted on a door plank and a front wallboard, plate rolling and strippingare conducted on a bottom cross beam and a bottom side beam, stripping is conducted before uncoiling is conducted, notch roller forming is conducted before sanding is conducted, other parts are subjected to flat plate shearing, cutting, notching and bending forming, a profile is subjected to profile sawing, primary sanding and primary zinc painting, and all parts are conveyed to corresponding table positions of a welding workshop after being stamped and manufactured. According to the method for overall seam welding of the container, the welding convenience of the container can be effectively improved and the using range of the container can be effectively enlarged; and the method changes a traditional container welding method to conduct welding, the welding strength of the container can beeffectively enhanced, and the container welding time is shortened.