The invention relates to a quantitative analysis method for influences of attack risk factors of the type 2 diabetes on the blood sugar, and belongs to the fields of bioinformation processing and medicine. The method comprises the steps of using C4.5 and EM clustering algorithms to realize the selection of important attack risk factors firstly; then dividing all the crowd according to the gender and age; using a BP neural network algorithm to calculate the sensitivity of a specific crowd; and finally realizing the quantitative analysis of the influences of multiple factors on the blood sugar based on the sensitivity. Compared with a great quantity of conventional statistic methods, the invention adopts the data mining method, mutual influences among the multiple factors are considered fully, meanwhile, the quantitative analysis of the influences of the multiple factors on the blood sugar is realized in the specific crowd, the quantitative analysis accuracy is improved greatly, and a determination method can be provided for refining intervention of individual attack. The quantitative analysis method can be used for intervention instruction for the individual type 2 diabetes attack, not only can the attack be prevented or delayed, but also the method can be applied and popularized to the quantitative analysis of other disease risk factors.