A data processing method, apparatus, medium and terminal thereof are disclosed in the present disclosure, the method comprising: determining data-to-be-processed based on data provided by a data provider, the data-to-be-processed includes plaintext description data; storing the plaintext description data to a database, the database may be used to support a search engine; and in response to confirmation of search results from the search engine by a data requestor, triggering a smart contract running on blockchain, the smart contract includes communication and records between the data requestor and the data provider. The technical solution in some embodiments improves search efficiency of data in blockchain technology applications.