The utility model relates to a doubly-fed asynchronous wind generating set low voltage cross-over device based on a DVR. The doubly-fed asynchronous wind generating set low voltage cross-over device based on the DVR is characterized by comprising a doubly-fed asynchronous wind generating set and a DVR dynamic voltage recovery device. The doubly-fed asynchronous wind generating set low voltage cross-over device based on the DVR is advantaged in that low voltage cross-over capability of a DFIG set is improved, and voltage fluctuation of a stator can further be reduced or even eliminated by the dynamic voltage recovery device and an injection transformer.