Similar appeal work order screening method and device based on topic model

The invention designs a similar appeal work order screening method and device based on a topic model. A historical work order similar to new appeal data is quickly and accurately given by adopting a topic model method based on word bag and word frequency vector + LDA + quick new appeal processing classification + similarity calculation. According to the method, data preprocessing operation is carried out on data, and mainly comprises data cleaning and data normalization. The method comprises the following steps: grouping data according to a handling department to which normalized data belongs under an actual condition, performing feature word extraction on grouped data word segmentation, forming a word bag and word frequency vector by applying a statistical method, then training data of each department by applying an LDA algorithm, and constructing a corresponding topic model. After a piece of new appeal data is obtained, weight superposition is combined, and the first three candidate classifications are dete