Multilayer circuit board

The invention is applicable to the technical field of circuit boards, and provides a multilayer circuit board. The multilayer circuit board comprises a circuit board body with a plurality of circuit layers, a first drill hole is drilled in the circuit board body, a copper-clad layer is arranged on the inner wall of the first drill hole, and a hole plugging material filled in a vacuum state is further arranged in the first drill hole. The circuit board body is also provided with a second drill hole which is formed by a drill cylinder, is coaxial with the first drill hole and is used for removing the copper-clad layer at the set depth of the first drill hole. According to the multi-layer circuit board provided by the invention, the hole plugging material filled in the vacuum state is arranged in the first drill hole, so that the defects of air bubbles and the like can be effectively prevented, and the second drill hole which is coaxial with the first drill hole and is used for removing the copper-clad layer wit