The utility model discloses a double -fed asynchronous wind power generator rotor winding's star contact loop constructs has solved the problem that current star contact loop constructs the easy fracture that exists and leads to the whole linear expectation of motor. The tip of the winding connection vertical section (6) of L shape connecting piece passes through the rotor winding insulation gap of lower floor (5) back and welds together with upper rotor winding (3), it is provided with the insulating layer to be connected with the winding at the rotor winding insulation gap of lower floor (5) between the tip of vertical section (6), be provided with six L shape connecting pieces on the tip of the rotor winding of lower floor (4) equidistant radian, it is provided with star ring (8) to connect at the star linkage of six L shape connecting pieces between the tip of horizontal segment (7), the star linkage of L shape connecting piece connects the tip of horizontal segment (7) to be in the same place through rivet welding hole (13) and star ring (8) welding. Effectively shorten the length of winding overhang length and connecting piece, improved the motor reliability of operation greatly.