Medical data retrieval method and system based on big data

The invention belongs to the technical field of medical data retrieval, and discloses a medical data retrieval method and system based on big data. The method comprises the following steps: constructing a medical knowledge graph and a medical named entity recognition model; the method comprises the following steps: acquiring massive medical data, and acquiring retrieval tags of all medical data; obtaining category labels of all medical data, and constructing a medical data classification model; storing the mass medical data into corresponding databases in a classified manner; extracting a plurality of retrieval information named entities of the retrieval information; carrying out standard medical word correction on the plurality of retrieval information named entities; obtaining a category label of the retrieval information; matching to a corresponding database, and matching a retrieval tag of the medical data in the database; and outputting a retrieval result. The problems that in the prior art, retrieval ef