Composite coating layer of difficult-to-deform light alloy blank and difficult-to-deform light alloy coated blank

The utility model discloses a composite cladding layer of a difficult-to-deform light alloy blank and a difficult-to-deform light alloy cladding blank, the composite cladding layer comprises a first cladding layer, the first cladding layer is used for cladding the difficult-to-deform light alloy blank, the material of the first cladding layer is an isolation material, and the first cladding layer is used for preventing adhesion and/or reaction; the second coating layer coats the first coating layer, and the material of the second coating layer comprises at least one of magnesium alloy, aluminum alloy, pure titanium or titanium alloy; the third coating layer coats the second coating layer, and the material of the third coating layer comprises at least one of steel, titanium alloy or high-temperature alloy; the third coating layer is coated with the fourth coating layer, and the fourth coating layer is made of an aluminum silicate fiber blanket. The hot working temperature of the blank can be effectively kept t