Abstract: In order to effectively use the knowledge resources on coal mine accident emergency relief cases, and provide the important decision references for the rapid rescue plan, the case-based reasoning system work flow of coal mine accident emergency relief is designed. The organization and express methods are established including mine situation table, emergency table and accident cases table. By extracting the characteristic information of the cases, the case retrieval algorithm is designed. The case retrieval algorithm with feedback is put forward to reflect the subjective initiative of relief experts