The invention relates to a sudden event emergency decision-making model construction method based on a mapping knowledge domain technology. Compared with the prior art, the method solves the defect that the emergency decision-making model is difficult to adapt to a great quantity of sematic information. The method comprises the following steps that: constructing a sudden event emergency decision-making knowledge ontology model; establishing a sudden event emergency decision-making mapping knowledge domain structure; and establishing a mapping matching mechanism of the sudden event emergency decision-making knowledge ontology model and the mapping knowledge domain structure. By use of the method, the sudden event emergency decision-making knowledge ontology is constructed, an entity attribute is used as a basis to form sudden event emergency decision-making knowledge entity nodes and a corresponding relationship between the sudden event emergency decision-making knowledge entity nodes through the mapping knowledge domain, and a decision-making model which combines the mapping knowledge domain with emergency decision-making knowledge is formed.