Connector is a functional component that connects, disconnects or converts circuits or optical channels with the help of electrical signals or optical signals and mechanical forces. It is used to connect electrical signals or optical signals between devices, components, equipment and systems, transmit signals or electromagnetic energy, and keep no changes in signal distortion and energy loss between systems. Where the photoelectric signal connection is needed, the photoelectric connector should be used. As one of the basic components necessary for the electrical connection of the whole circuit system, the connector has been widely used in aviation, aerospace, military equipment, communication, computer, automobile, industry, household appliances and other fields.