Abstract: Considering that a unified measurement of input and output is not realized in the evaluation on the current distribution network planning schemes, which limits the evaluation effects and cannot support the refined investment decisions, a new evaluation and forecast method for input-output benefits of distribution networks is proposed in this paper. Firstly, the peer measurement mode for input-output benefit is built through the analysis of the supporting conditions for output benefits; then, the evaluation indexes which can accurately reflect the input-output relationships are selected to establish the evaluation index system for the input-output benefit; next, the input-output benefit forecast method is proposed based on the quantitative association analysis of the input-output benefit; finally, the effectiveness and practicability of the proposed method are verified through case study.