Efficient and energy-saving gas heat converter

The invention discloses an efficient energy-saving gas heat converter which at least comprises a shell, a first-zone heat exchange module and a second-zone heat exchange module. The first-zone heat exchange module and the second-zone heat exchange module are sequentially arranged in the shell from bottom to top; the water inlet end of the first-zone heat exchange module is connected with the water outlet end of the second-zone heat exchange module, wherein the first-zone heat exchange module comprises a plurality of heat exchange tubes and a plurality of elbows used for sequentially connecting the multiple heat exchange tubes together; and inner threads or lines which are in different shapes and are easy to machine are formed on the inner surfaces of the partial or all of the heat exchange tubes, and fins are formed on the outer surfaces of the heat exchange tubes. The gas thermal converter can be widely applied to different gas heat converters in household appliances or industrial and commercial fields and i