The self controlled switch is a high reliable reinforced switch based on domestic Shengke switch chip and dragon core CPU. It is a high-density, high-performance and high reliable on-board reinforced Ethernet switch which is designed for the special industry to deal with the harsh external environment. The localization rate has reached 100%. The products are fully sealed magnesium aluminum alloy shell, fan free heat dissipation technology, high-density external interface to meet the requirements of harsh environment in special industries such as vibration resistance, electromagnetic compatibility, three prevention and other special industries.