Printed circuit board

The utility model provides a printed circuit board, belongs to the technical field of electrical devices, and aims to solve the problems that when a printed circuit board is connected with a box body through a bolt structure and the box body is impacted, the fixedly connected part of the printed circuit board and a bolt in the box body is easy to break, the printed circuit board falls off from the box body, the printed circuit board is damaged, and the service life of the printed circuit board is prolonged. Comprising a circuit board main body, a positioning through hole, a component, a circuit capacitor, a mainboard stabilizing mechanism and a mainboard connecting mechanism, the positioning through hole is formed in the upper end surface of the circuit board main body; the component is fixedly connected to the upper end surface of the circuit board main body; the circuit capacitor is fixedly connected to the upper end surface of the circuit board main body; the mainboard stabilizing mechanism is arranged on