The utility model discloses a quick tensioner bullwheel of high -tension distributing line, including connecting rod, bracing piece and ropewinder, the equal hinged joint in connecting rod both ends has bracing piece and connecting rod surface to be equipped with the screw thread, bracing piece one end fixedly connected with ropewinder, the ropewinder includes spool, ratchet and stationary dog, spool one end fixedly connected with ratchet, the ratchet top is equipped with the mutual meshing of stationary dog and stationary dog and ratchet, the spool other end is connected with the spindle nose. The utility model discloses a simple structure, convenient operation not only can carry out tight line to high voltage transmission lines and can also carry out the roll -up to unnecessary circuit, adopts two tensioner bullwheel, has realized the effect of quick tight line, has improved work efficiency greatly.