Abstract: Four filler metals were applied to braze zinc alloy by flame brazing. Based on the results of melting temperature, wettability, the mechanical properties and the porosity of brazed seam, the ideal filler metal SnZn-1 for Zinc alloy was successfully obtained. The microstructure and compounds of the brazed joint were further studied by SEM and EDS. The results show that the tensile strength of SnZn-1 brazed joint reaches up to 62 MPa, and the porosity rate is about 10%. The most of interface microstructure are uniform equiaxed structure, and the mutual diffusion and dissolution of elements occur between the base metal and the filler metal, which forms the better brazed joint.