The invention discloses a technical-economic integration design method for power distribution network engineering design. The method comprises the following steps that: designing software into three modules, i.e., a design module, a resource library module and a construction cost editing module; in the design module, a construction cost parameter setting module, a construction cost compiling module and a construction cost engineering quantity module are increased; the construction cost engineering quantity module is used for outputting materials, quotas and parameter data; a construction cost resource library is combined with a design resource library, the quotas are associated in the design resource library, and a restoring function is increased; the construction cost module is integrated into power distribution network design, a high-grade function is cancelled, and a necessary construction cost interface is displayed; and the function of the construction cost module is cost composition and statement reveal. During design, the quotas can be regulated, and construction cost is realized while design. Through a construction cost view function, construction cost is visually displayed in design drawing, and the visualization of the construction cost is realized in a design process.