The invention relates to a turning-connection system of an electric power high voltage connecting wire. The turning-connection system of the electric power high voltage connecting wire comprises a metal support. The metal support comprises a horizontal section, a first vertical section and a second vertical section, wherein the first vertical section and the second vertical section are placed at the two ends of the horizontal section respectively. The upper end of the first vertical section and the upper end of the second vertical section are placed on the same horizontal plane. A middle shaft is arranged above the metal support, and the middle shaft is fixed by being erected at the upper end of the first vertical section and the upper end of the second vertical section. A first insulation supporting bar, a second insulation supporting bar and a third insulation supporting bar are arranged between the first vertical section and the second vertical section. Same metal fixing disks are fixed at the upper ends of all the insulation supporting bars, and the other ends of the three fixing disks are connected with a first high voltage insulation plate, a second high voltage insulation plate and a third high voltage insulation plate respectively. The turning-connection system of the electric power high voltage connecting wire has the advantages that a high voltage extension wire can not be abraded and jackknifed easily, the service life of the high voltage extension wire is prolonged, and the turning-connection system is suitable for various fields and occasions, high in practicability and safer in turning connection.