Abstract: By setting two coaxial static contacts, the horizontal direct switching of the moving contact conducting rod can be realized. The two static contacts provide the connection position of the high potential bus-bar respectively, so that the switch includes the high potential of the operating mechanism and the bus-bar in the power grid simultaneously, the problem of insulation between the operating mechanism and the isolating cutter body is avoided. Remote control of clean compressed air drives the pull rod to achieve electrical isolation between drive and control, the ability to resist electromagnetic interference is strong, avoiding the mis-operation caused by strong electromagnetic interference. The operation is safe and convenient, and the cost of the project is reduced, and it can meet the isolation requirements of indoor high voltage instantaneous high current operating conditions with different voltage levels and frequent operation under 110kV and below.