The invention belongs to the technical field of transmission lines, in particular to a safe transmission line, which comprises vertical columns, supporting plates, fixing plates, a wire, transverse plates, solar panels, buzzers, pulling ropes, a protective net, a fixing ring, connecting plates, grooves, buffer pads, limiting rings, extension plates, screw rods and nuts. The safe transmission lineis simple in structure and convenient in operation; through the design of the protective net, falling caused by long-time use of the wire can be avoided, and falling down to the ground to result in electricity leakage can be avoided; through sound production by the buzzer, birds can be dispersed, standing of the birds on the wire to bring pressure on the load-bearing of the wire can be avoided, and the service life of the wire is improved; and in the safe transmission line, through the groove in the connecting plate, the wire is limited, each wire is fixed through the limiting ring, the dangercaused by mutual contact between the wires is avoided, and the shaking frequency of the wire is also reduced.