The invention discloses a method and device for determining a data table association relationship, and relates to the technical field of computers. One specific embodiment of the method comprises thefollowing steps: S1, querying an associated field in a to-be-determined data table by utilizing an associated identifier, the associated field comprising a table name of the data table where an associated field associated with the associated field is located and the associated identifier, the associated field being a unique index of the data table where the associated field is located, and the associated field being an index of the to-be-determined data table; and S2, analyzing the associated fields, and obtaining the table names of the data tables where the associated fields corresponding tothe associated fields are located, so as to determine that the data tables are associated tables about the associated fields of the to-be-determined data tables. According to the embodiment, the change operation of the associated data table can be simplified, the application flexibility of the associated data table is improved, and meanwhile, the data consistency and integrity of the associated data table can be kept.