Thermal insulating board of combined-welding-type stainless steel water tank

The invention discloses a thermal insulating board of a combined-welding-type stainless steel water tank. The thermal insulating board includes a stamping board and a foaming thermal insulating layer. The stamping board is a rectangular stainless steel board of which a middle part is like an arc-shaped swelling part of exterior of the water tank and the foaming thermal insulating layer is manufactured from an imported polyurethane material through high-density foaming heat insulation. The thermal insulating board can solve a thermal insulating problem of a combined-welding-type stainless steel square water tank and is reasonable in designed structure. By means of a foaming technology, the foaming thermal insulating layer is condensed and hardened quickly, is high in density and is free of a dead angle. The thermal insulating board is good in a thermal insulating effect.