The utility model discloses an electrified installation type V -arrangement insulator chain spring catch separation -preventing device, establish at the inside anti -escape plate of backup pad including backup pad and cover, backup pad and anti -escape plate are half frame type structure and its open position in right side, the right side upper portion symmetry of backup pad sets up the first baffle of leanin, backup pad right side surface is close to the lower part symmetry and sets up a pair of first spliced pole that is used for connecting the insulating bar working head, the backup pad medial surface just sets up the second spliced pole with the first corresponding department in spliced pole position, anti -escape plate is last to be set up and second spliced pole matched with spout with the corresponding department in second spliced pole position, anti -escape plate's front side bounding wall and the second baffle that rear side bounding wall upper end all set up inside extension,anti -escape plate's left side bounding wall medial surface is close to the bumping post that the lower part set up inside extension. The utility model discloses easy after can fundamentally solvingV -arrangement insulator chain spring catch operation a period or receiving the bad weather the not hard up problem that drops appears.