This paper proposes a management method of distribution network's wide-area reactive power control with low voltage-violated buses. The concept of voltage-violated bus is proposed, and based on this concept, the distribution network's reactive power control with low voltage-violated buses is established. This model is composed of the controlled voltage sub-model for weak areas and the reactive power optimization sub-model for non-weak areas. The objectives are the minimum downside voltage deviation for voltage-violated buses and the minimum real power loss respectively. The set of constraints are based on the conventional reactive power optimization constraints and update the lower voltage boundary constantly. In order to enhance solving-efficiency, the parallel cooperative co-evolutionary differential evolution algorithm (PCCD-EA) is hired for solving the proposed model. Finally, a distribution system with 55 buses of Guangzhou is simulated, which verifies that the proposed method is effective. This work is supported by Natural Science Foundation of Chongqing (No. cstc2015jcyjBX0033).