The invention relates to an energy-saving gas stove, which comprises an energy-gathering heat-insulation reflecting cover 7, a stove end 11, a stove body panel 10, a combustion cavity 4, a stove frame A3, a stove frame B18, a support frame 19, a gas control ring 22 and a bottom case 12. The energy-saving gas stove is characterized in that a pot 1, the energy-gathering heat-insulation reflecting cover 7, the stove end 11, the stove frame A3 or the stove frame B18 and the gas control ring 22 jointly form the combustion cavity 4, fuel gas is sprayed out from the stove end 11 for combustion, supplementary secondary air enters the combustion cavity 4 via a secondary supplementary air passage 9 and gas holes 23, the combustion of the fuel gas is carried out in the combustion cavity 4, and combusted smoke gas is exhausted from a smoke gas outlet 2 or a smoke gas outlet 13. The energy-gathering heat-insulation reflecting cover technology is adopted, the open external combustion type combustion of a domestic gas stove is changed into the semi-closed internal combustion type combustion, the heat radiation loss and the convection loss caused by the open state are reduced, the temperature in a combustion chamber is raised, the generation of harmful gas is reduced because of full combustion, the heat utilization rate is increased, the fuel gas consumption is saved, and the goals of energy protection and energy saving are reached.