The utility model discloses a single loop strain insulator tower, a serial communication port, including body of the tower, well looks wire wire jumper tower window, limit looks wire cross arm, well looks wire wire jumper support, ground wire cross arm, well looks wire wire jumper tower window set up in the body of the tower top, the shape of well looks wire wire jumper tower window is the polygon, limit looks wire cross arm set up in edge below the well looks wire wire jumper tower window for installation both sides looks strain insulator -string, both sides looks wire jumper cluster, well looks wire wire jumper support set up in the top of well looks wire wire jumper tower window, well looks wire wire jumper support way along the line direction is " one " style of calligraphy and stretches out, the ground wire cross arm set up in the upper end edge of well looks wire wire jumper tower window, the shape of ground wire cross arm is triangle -shaped. The utility model discloses mate to use betterly with the wineglass tangent tower, be applicable to heavy icing that the electric property had relatively high expectations or the area that has the limit for height requirement.