The utility model discloses an insulator chain fixing device, be in including bottom plate, setting support and setting on the bottom plate are in roof on the support, the roof with in the bottom plate one be fixed with be used for with the nail is connected to the ball socket complex second of insulator chain's one end, another with the second is connected the relative position of nail and has been seted up the hardy hole, so that the head of the first connection nail of the insulator chain other end penetrates behind the macropore of hardy hole with the aperture joint of hardy hole. The utility model discloses an insulator chain fixing device passes through second connection nail and is connected with insulator chain's one end, is connected through the hardy hole and insulator chain's the other end, and insulator chain is flare -outed to the support to hang between bottom plate and roof, so, just can the looks interval between the insulator among the insulator chain, consequently can not avoid insulator chain's breakage because of vibrations take place collide with each other.