The invention discloses and provides a control method and a control system for a distribution network. The method comprises the following steps: acquiring the information of a line which requires power failure of each project of the distribution network, taking power failure lines in the line information as a first line in sequence, and then classifying the projects which comprise the first line into the same project group to obtain a first project group, for example, when both the project A and the project B comprise the same power failure line C, dividing the project A and the project B into the same project group. Therefore, the first project group is determined to be the project group which is required to be subjected to the power failure operation. In the way, an operator performs power failure operation on the first project group, namely when the power failure operation is performed on the line C, the project A and the project B can be executed simultaneously, so that the situation of performing power failure on the line repeatedly when each project is implemented are reduced.