The invention discloses a copper wire adhesive tape isolating device of a transformer framework. The copper wire adhesive tape isolating device comprises a middle retainer ring, two port retainer rings, two isolating barrels and two isolating rings, the middle retainer ring is perpendicular to a coil rack and is fixed on the outer surface of the coil rack, the port retainer rings are perpendicular to the coil rack and are fixed on the outer surfaces of the head end and the tail end of the coil rack, the isolating barrels sleeve the coil rack, two ends of the isolating barrels are fixedly connected with the middle retainer ring and the port retainer rings on two sides, each of the isolating barrels is provided with a sliding groove parallel to the direction of the coil rack, each isolating ring is provided with a clamping strip, and the isolating rings slidably sleeve the isolating barrels while the clamping strips are clamped in the sliding groove respectively. The copper wire adhesive tape isolating device has the advantage that performance of the transformer framework can be improved in an omnibearing manner.