The invention discloses an entity coreference resolution method based on similarity. The implementation process includes the steps that firstly, data in a data set is preprocessed to form data pairs, and the data pairs are entity pairs; secondly, weights are set, and similarity values are calculated and compared with a set threshold; thirdly, when the set threshold is reached, entity unification is carried out, that is, all the data pairs reaching the threshold are fused into one datum; when the set threshold is not reached, data summarization is carried out, and the data pair data is summarized to form a new data set, wherein a summarization result comprises the combined datum and data smaller than the threshold. Compared with the prior art, the weights and measurement indexes of similarity, a good processing effect is achieved, the requirement for entity coreference resolution in massive data processing can be met, effective guarantee is provided for entity coreference resolution, practicality is high, and popularization is easy.