为解决地下综合管廊项目PPP模式运作过程中存在的入廊定价难的突出问题，首先，基于现阶段入廊价格管制的需要以及各参与方在入廊定价决策过程中的主从递阶结构特点，决定利用双层规划模型研究PPP模式下地下综合管廊项目的入廊定价问题，将政府方作为定价决策的上层，社会资本方和管线单位作为决策的下层，建立政府、社会资本方与管线单位分别以社会福利最大化、预期收益最大化和保留效用最大化为目标的双层规划模型，以期求解得到令三方满意的入廊费、日常维护费与补贴额度。然后，以延安市地下综合管廊PPP项目为例，检验模型与求解方法的可行性。最后，基于研究结论提出加强顶层设计、强化价格监管、建立动态调价机制的合理化建议。

The admission of publicprivatepartnership (PPP) project of underground utility tunnel is difficult to price. Hence, based on the admission price control requirement of underground utility tunnel at present stage and the main and subordinate hierarchical structure characteristics of every participant in the price decisionmaking process, the bilevel programming model is adopted; and then the government is regarded as the upper level of price decisionmaking, and the social capitals and pipeline suppliers are regarded as the lower level; a bilevel programming model is established to maximize the social welfare, prospected profit and reserved effect and to make a rational pricing. The applicability of the abovementioned model is verified in PPP project of underground utility tunnel in Yan′an. Finally, some rational suggestions such as strengthening the toplevel design, strengthening the price supervision and establishing dynamic price adjustment mechanism are put forward.