Circuit board convenient to maintain

The utility model discloses a circuit board convenient to maintain, which belongs to the technical field of mechano-electronics and comprises a substrate, a fixed through hole, a copper circuit, a mounting through hole, an external thread insulating rubber tube, an incomplete regular hexagon copper plate, a first rectangular copper plate, a first jack, a second rectangular copper plate, a copper block, an arc-shaped copper plate, a second jack and a complete regular hexagon copper plate. By welding the electrical component between the first jack and the second jack, the copper plate, the arc-shaped copper plate, the first rectangular copper plate, the incomplete regular hexagon copper plate and the second rectangular copper plate enable the disconnected part of the copper circuit to be reconnected due to the arrangement of the mounting through holes, and signal transmission is carried out. When the branch node is connected, the pins of the original electrical components can be cut off, the normal electrical c