The utility model provides an HDI plate with a fixed structure. The HDI plate comprises a substrate eroded with circuit, a welding disc arranged on the position of the welding components and eroded on the substrate, a welding protective layer on the upper surface of the substrate, a first opening above the welding disc of the welding protective layer, a first anti-corrosion layer on the welding protective layer, and a second opening arranged on the first anti-corrosion layer above the welding disc, wherein the first opening and the second opening form a step portion, the upper layer of the first anti-corrosion layer is a seed crystal layer which covers the step portion and the upper surface of the welding disc, a metallic column for welding circuit components is arranged on the step portion, and a second anti-corrosion layer is arranged on the two sides of the metallic column. The HDI plate is provided with special welding nodes, and components are welded on the nodes to firmly fix the components on the HDI plate, thereby preventing fault of HDI plate due to welding.