The embodiment of the invention discloses a data matching method and device and relates to the field of communication. The mismatching problem caused when data of different data sources is subjected to fuzzy matching is solved. According to the specific scheme, first data records and second data records are obtained, an association field and a to-be-matched field of the data records are obtained,the data records with the key values same as that of the association field in the first data records belong to the same group to obtain a first group set, the data records with the key values same asthat of the association field in the second data records belong to the same group to obtain a second group set, the two data records of the first group and the second group are associated, a to-be-matched distance of the two associated data records is calculated, the data record with the smallest absolute value in the to-be-matched distance is determined as the record which is successfully matched, and the associated data record with the field value same as that of the to-be-matched field in the successfully matched associated data record is deleted. The method and device are used in the datamatching process.