The present invention discloses an environmental ring main unit isolating distance visual system. The environmental ring main unit isolating distance visual system is installed at an environmental ring main unit gas tank; the environmental ring main unit gas tank is internally provided with a disconnecting switch horizontal spindle and an A-phase disconnecting switch; the environmental ring main unit isolating distance visual system comprises a collection module, an insertion module and a portable module; and the collection module is located in the environmental ring main unit gas tank, the insertion module is installed at the tank body of the environmental ring main unit gas tank, and the portable module is connected with a portable module hot plug. Two ends of a data transmission are respectively electrically connected with a camera and an aviation socket, and a data receiving and processing device is connected with an aviation plug hot plug. The camera collects internal images in real time and outputs the internal image outwards through a plug module to cancel a transparent watch window so as to observably improve the integrated structure intensity of the environmental ring main unit.