The invention discloses a sodium-sulfur battery positive electrode container. The sodium-sulfur battery positive electrode container comprises a shell and a solid electrolyte ceramic tube which is located on the inner side of the shell in the radial direction and is coaxial with the shell; the top of the positive electrode container is sealed through a ceramic insulating ring located on the top surface of the solid electrolyte ceramic tube and a positive electrode sealing ring located between the shell and the radial direction of the ceramic insulating ring; the bottom of the positive electrode container is sealed through a bottom cover; the bottom cover is divided into a supporting ring and a bottom sealing part; the bottom sealing part is also divided into a horizontal and annular supporting ring mounting part and a circular-arc-shaped sealing structure which is located at the radial inner side of the supporting ring mounting part, is concave downward and has a shape corresponding to the shape of a bottom surface of the solid electrolyte ceramic tube; the top surface of the supporting ring is welded and fixed with the external circumference of the bottom surface of the supporting ring mounting part; and the height of the supporting ring is greater than that of the circular-arc-shaped sealing structure.