The utility model discloses a titanium-steel composite panel of the evaporation chamber housing for vacuum salt making, comprising a carbon steel substrate and a titanium composite layer, wherein, the carbon steel substrate is a carbon steel sheet connected through welding; the titanium composite layer is a titanium steel sheet connected via a plurality of filler strips. The utility model is characterized in that the external surface of the filler strip is arc-shaped; considerable space for expansion is reserved at the weld joint to prevent crack at the weld joint of the titanium composite layer, thereby prolonging the service life of the evaporation chamber for vacuum salt making.