Fuente: Wipo "BigData" The invention discloses a special disease construction medical term standardization method based on medical big data, and relates to the technical field of big data information processing. A standard diagnosis dictionary related to diagnosis is planned, a diagnosis mapping dictionary is sorted according to the standard diagnosis dictionary and the diagnosis data, data formatting preprocessing is performed on the diagnosis data needing to be standardized, the standard diagnosis dictionary data and the diagnosis mapping dictionary data, formatted diagnosis data are screened, and are matched with the diagnosis mapping dictionary data, the successfully matched diagnosis data form standard diagnostic data according to the diagnosis mapping dictionary and the standard diagnosis dictionary after data formatting, the unsuccessfully matched diagnosis data are subjected to similarity matching by using NLP, and the standard diagnosis data corresponding to the diagnosis mapping dictionary data of which the similarity matching meets the requirement are selected as the standard diagnosis data of the current diagnosis data.