The present invention relates to a safety insulated support device for live work of an overhead distribution line, In the safety insulated support device in which the overhead distribution line is installed, The safety insulated support device, A first support band 11 in the shape of a circular band inserted and installed in the electric pole (EP)； Wancheol bar 12 provided in the horizontal direction on the first support band 11； Wancheol 10 with: A processing distribution line support insulator 120 installed on the wancheol bar 12 and supporting the processing distribution line AL1: With the support insulator 130 for live line work installed on the wancheol bar 12 adjacent to the processed distribution line support insulator 120: A lightning arrester 110 installed on the wancheol bar 12 and outputting an abnormal current signal when an abnormal current passes: A transmitter 160 installed on the wancheol bar 12 and wirelessly outputs a warning signal when an abnormal current signal is received from the arrester 110: A fixture 141 installed on the wancheol bar 12； A rotating table 142 rotatably installed on the fixing table 141； A reflective mechanism 140 having a； a plurality of reflective ribbons 143 installed on the rotating table 142 and: The connection bar 20 provided in the vertical direction on the lower side of the first support band 11 and: The vertical reflective panel 150 installed on the surface of the connection bar 20 and: A second support band 30 in the shape of a circular band, which is fixed to the connection bar 20 and inserted into the electric pole EP, and on which the transformer TR is installed: A third support band 41 of a circular band shape fixed to the connection bar 20 and inserted into the electric pole EP, and positioned below the second support band 30； A first branch line support 42 installed on the third support band 41； A first branch line fixing insulator 43 installed on the first branch line support 42 and to which the first branch
