Hydraulic tension device capable of tensioning automatically and stopping returning of tension pulley

The utility model provides a hydraulic tension device capable of tensioning automatically and stopping returning of a tension pulley. A pump station and a hydraulic control platform of the hydraulic tension device are connected; the hydraulic control platform is connected with an oil cylinder; the oil cylinder is connected with a tension pulley group; the oil cylinder is connected with a bottom frame; the front end of the piston rod of the oil cylinder is connected with a sliding bracket; the tension pulley group is connected with a traveling pulley group; and a horizontal rope guide pulley group and a vertical rope guide pulley group are connected with the bottom frame. The hydraulic tension device improves the performances of a ground track conveying system adopting the stepless rope traction principle, thus being capable of effectively avoiding gliding phenomenon of the running vehicle of the system due to self weight when passing through a slope peak section, and improving the safety and reliability of th