The utility model provides a dynamic voltage regulating device of distribution network, including switching module and body module, the switching module includes bypass circuit breaker S1, isolator S2and isolator S3, body module is including parallelly connected protection branch road, compensation branch road and adjust the branch road, it is after isolator S2, body module, isolator S3 establishties in proper order, parallelly connected with bypass circuit breaker S1. The utility model provides a dynamic voltage regulating device of distribution network is rational in infrastructure simple,is convenient for make and is integrated, with low costs, not only can realize the dynamic voltage control of distribution network, still has short -circuit current restriction function, can reduce the trouble and to distribution network and user's influence, have stronger adaptive and operational flexibility.