The utility model relates to a 630 steam condition boiler water wall more than DEG C, include the tube panel that forms by the body concatenation side by side of N root, its characterized in that: be equipped with a fin respectively in the left and right sides of every root canal body, two fin welded connection of butt joint are gone up to two adjacent root canals body. Adopt the utility model discloses afterwards, can reduce boiler water wall and make welding quantity, improve quality reliability, reduce boiler manufacturing cost, the butt joint weld bond is managed to the nickel base alloys water -cooling wall that the power plant building site only has the incone1617 type need not weld after heat treatment, only has the welding between this type nickel base alloys band steel. In the power plant building site, nickel base alloys small -bore pipe butt weld need not preheat and weld after heat treatment.