在大型公共项目的运作过程中，融资已经成为解决资金缺口的主要手段。笔者在界定项目融资结构、项目资金流量及其内涵的基础上，通过建立定量模型，从融资比例、建设工期和项目收益率三个方面对大型公共项目运作中的融资风险进行了分析，并通过算例对该模型进行了验证。

During the operation process of largescale public project, financing risk is a main factor to the success of project. Based on the analysis of composition of finance and its connotation, using quantitative mode, this paper discussed the financing risk of large public project operation from three aspects: finance scale, construction time and return on the investment. Finally, it gave an illustration to prove the right of mathematic mode and put forward proposals for the increase of profit.