Based on differentiated and systematic characteristic of energy saving programming in distribution networks, bi-level programming model for partitioned distribution network is established with considering investment cost and energy saving benefit. The determinate loss reduction target and total investment costs are used as the upper programming constraints, which satisfy optimal selection of reconstructive lines and its investment allocation. The follower programming objective is minimization of total expenditures, and its constraints are operation restricts and reconstruction restricts, which let energy saving reconstruction collaborative optimal schemes meet above requirements. Hybrid algorithm which integrates line loss prediction and forward and backward substitution flow calculation method is proposed to solve the above model. The results of examples and energy saving technological reconstruction programs in certain city verify the rationality and practicability of the proposed differentiated planning method.