High-protection isolating switch for rail transit line

The invention discloses a high-protection isolating switch for a rail transit line, relates to the technical field of isolating switches, and aims to solve the problem that a vertical opening type isolating switch is easily influenced by dust and freezing environmental factors. Comprising a disconnecting switch main body, the bottom of the disconnecting switch main body is provided with a base, the base is internally provided with a transmission mechanism, the transmission mechanism comprises a driving rotating shaft, a driven rotating shaft, a driving crank arm, a connecting piece, a first driven crank arm and a second driven crank arm, and the driving rotating shaft is connected with an output shaft of an operating mechanism through a reversing transmission unit; one end of the driving crank arm is fixedly connected with the driving rotating shaft, one end of the first driven crank arm is fixedly connected with the driven rotating shaft, and the connecting piece is arranged between the other end of the driv