Abstract: To roundly understand and scientifically evaluate the risks of a venture business, a risk evaluation systemwith multiple evaluation indexes was set up based on deeply analyzing its characteristics and risk factors during a start-up period, and the fuzzy synthetical evaluation method was used to evaluate the risks of an enterprise. To overcome the shortcomings of the methods to subjectively or objectively determine the weight of indexes, the group eigenvalue method combining with the variation coefficient method was adopted. Finally, management risk was given to showthe application of the proposed method.