The invention provides a method and device of mining unknown association relations of a rule association model. The method of mining the unknown association relations of the rule association model comprises the steps of obtaining the rule association model and at least one sample message; according to concepts in all tuples of the rule association model, standardizing at least one sample message, and obtaining at least one standard sample message; processing the standard sample messages, and obtaining key word sets corresponding to each standard sample message; according to the key word sets, calculating and obtaining a binary relation expression list; matching the binary relation expression list with a candidate association expression list of the rule association model; according to a matching result, establishing association relations of concepts of two adjacent tuples of the rule association model. According to the method and device of mining the unknown association relations of the rule association model, valuable association relations not set in advance in the rule association model can be constructed to enable the rule association model to comprehensively and visually reflect a valuable association result in real task scenes, and the precision of valuable association result positioning is improved.