Method and device for generating text abstract

The invention provides a method and a device for generating a text abstract. The adjacency relation among the clauses can be accurately obtained by constructing the sentence network relation among the clauses in a target text, a sub-relation network formed by a plurality of clauses with highly uniform represented text contents is determined from the sentence relation network, and the document similarity between each sub-relation network and the sentence relation network is accurately calculated to determine a target sub-relation network serving as a text abstract. Therefore, according to the method provided by the invention for generating the text abstract, the matching degree between the text content of the generated text abstract and the text content of the target text can be effectively improved, and the text abstract is enabled to more accurately represent the target text, so that a more accurate text basis can be provided for subsequently matching the target video material, and the accuracy of the matche