The strategy of pushing similar cases of judicial documents is helpful to solve problems such as the disunity of judgment standard, the difference of judgment with similar cases and the irregularity of sentencing in the judicial process. Aiming at the similar cases pushing strategy of judicial documents, based on the written discourse structure and linguistic expression of judicial documents, we can carry out the research by extracting the contents of judicial documents, analyzing the weights of different speech words, recognizing the unknown Chinese words in the contents, and calculating the quantity expression similarity. Besides, we design the corresponding case similarity calculation model. Experiments on real judicial documents datasets prove the validity of the model.