The solid insulated ring main unit switchgear is a new intelligent grid distribution equipment, which is widely used in the urban power grid terminal. It is an all-insulated fully-sealed compact switchgear. The vacuum interrupter and its conductive connection, isolation switch, grounding switch, main busbar, branch busbar and other main conductive loops are solely or all sealed in an APG injection-molded epoxy resin shell. Functional units are connected through all-insulated solid flow busbars, so the entire switchgear is free from exterior environment influence, ensuring the equipment operation’s reliability and operator’s safety.