Gas combustion heat exchanger

The utility model discloses a gas combustion heat exchanger which comprises a three-dimensional rectangular combustion box frame, a water heat exchanger, a water inlet pipe and a water outlet pipe. The highest circle of pipe body coiled and connected to the front side wall body and the rear side wall body of the combustion box frame extends upwards and is welded and communicated with corresponding small front side wall branch heat dissipation water pipes and small rear side wall branch heat dissipation water pipes; the front side wall branch heat dissipation small water pipes and the rear side wall branch heat dissipation small water pipes are arranged at the positions right opposite to the front side wall and the rear side wall of the water heat exchanger. The front side wall branch heat dissipation small water pipes and the rear side wall branch heat dissipation small water pipes are connected and communicated with the water inlet pipe in parallel, and the water source circulation directions are consistent.