This paper explores the method for evaluating the risks of venture capital projects. Based on analyzing the factors affecting the risks of venture capital projects, I establish an index system for evaluating the risks. I present a model for evaluating the risk level of single venture capital project by applying the uncertain type analysis of hierarchy process and the extended weighted arithmetic averaging operator. Based on the uncertain multiple attribute decision making method, I establish a model for evaluating the rank of the risks of multiple venture capital projects. I give two examples about practical application to show the reasonableness and effectiveness of the models.