Hard alloy cutter with two structural coatings

The invention relates to a hard alloy cutter with two structural coatings, solving the problems of the existing cutter such as high surface roughness, poor corrosion resistance and poor toughness and thermal shock resistance. The hard alloy matrix is provided with a medium and high temperature continuous chemical composite coating; and after the sandblast treatment is performed to the medium and high temperature continuous chemical composite coating, a surface TiN coating is deposited on the chemical composite coating through the physical deposition method.