The invention relates to an efficient gas cooking appliance with a backheating function. The efficient gas cooking appliance comprises a
combustion area, an envelope heat exchange area and a pot placing area. A cooking pot is placed in the pot placing area, the envelop heat exchange area is positioned on the outer side of the
combustion area, and the pot placing area is arranged above the
combustion area and the envelop heat exchange area. The envelop heat exchange area comprises a
radiation cross-flow
heat exchanger, a
heat exchanger with double fluid channels and a high-position
smoke outlet, and high-temperature
smoke of a cooking range is guided by the
radiation cross-flow
heat exchanger, the heat exchanger with the double fluid channels and the high-position
smoke outlet jointly so as to flow close to the bottom of the cooking pot. Accordingly, a forced flowing channel of the high-temperature smoke is formed, heat exchange between the high-temperature smoke and the bottom of the cooking pot is promoted, heat exchange is realized between medium-temperature smoke which is cooled after heat exchange of the bottom of the cooking pot and low-temperature combustion-supporting air which is supplemented into the cooking range, a backheating mechanism of the smoke is formed, high-temperature
radiation of the high-temperature smoke to an environment and
diffusion of the smoke in the environment are reduced, the temperature of the combustion-supporting air is increased, the temperature of the high-temperature smoke of the cooking range is also increased, and technical problems of low heat efficiency and severe environmental
pollution of an existing gas cooking appliance are solved.