The invention discloses an electric power circuit stringing device across a river. The stringing device comprises a ground anchor mechanism used for improving stability, a support mechanism arranged on the ground anchor mechanism and an across mechanism arranged on the support mechanism. The ground anchor mechanism, the support mechanism and the across mechanism are connected with a control mechanism. The support mechanism comprises a revolving base rotatably arranged on a ground anchor plate, a telescoping rod arranged on the revolving base and a fixed seat arranged on the telescoping rod. A sleeve ring is rotatably arranged on the upper end of the telescoping rod. The outer surface of the sleeve ring is equipped with a fixed ring connected with a traction rope. A big gear wheel is fixedly arranged on the lower part of the telescoping rod. A driving motor is arranged on the ground anchor plate. A small gear wheel engaged with the big gear wheel is arranged on the output shaft of the driving motor. The driving motor is connected with the control mechanism through electrical signals. The stringing device is advantageous in that the stringing device is simple to operate, easy to recycle, safe to operate and less affected by weather.