The utility model discloses a triple axle electric power cable isolating device, triple axle electric power cable isolating device contain an insulating sleeve, insulating sleeve contain a discoid sleeve pipe base and a hollow cylindric casing main body, the footpath of sleeve pipe base upwards be equipped with a three locking screw and a ka xiancaokou, the lateral wall of casing main body on be equipped with a sleeve pipe slit, the locking screw in be equipped with a lock bolt respectively. The utility model discloses a triple axle electric power cable isolating device's advantage is: duringthe use, the user is in when installation, can be directly go into the cable card to calorie wire casing mouth in, then the three lock bolt of screwing respectively for the lock bolt closely support the cable can, just so accomplished cable isolating device's installation. This triple axle electric power cable isolating device simple structure, simple to operate, low cost, the practicality is strong.