The invention relates to a system for predicting industrial control network vulnerabilities based on Summary length features, and the method comprises the implementation steps: S300, obtaining a text sequence {Str1, Str2,...} of each sample vulnerability id in the corresponding Summary; s301, when e is equal to 1, determining the feature weight we of the Sre according to the length of the Sre; Step S302, when e is greater than 1, comparing the text information of the Stre-1 and the text information of the Stre; if the two are consistent, judging whether z * we-1 is larger than a preset first feature weight threshold value wemin or not; if yes, setting w = z * we-1; if z * we-1 is smaller than or equal to wemin, setting wee to be equal to wemin; if the text information of the Stre-1 is inconsistent with the text information of the Stre, determining a feature weight we of the Stre according to the length of the Stre; step S303, based on the feature weight we of each Stre and the Stre, determining a Summary feature parameter value corresponding to each Stre; and step S304, training based on the Summary feature parameter value corresponding to the sample vulnerability id to obtain an industrial control network vulnerability prediction model to predict an industrial control network vulnerability outbreak probability. According to the invention, the vulnerability outbreak probability of the industrial control network can be quickly and accurately predicted, and the safety of the industrial control network is improved.