This paper proposes a hyponymy extraction method based on parsing and rule matching

using sentences that meeting "is-a" pattern as research subjects. To solve the problem that difficult to get hyponym from complex sentences

this paper presents a method to get center concept based on pasring result. According to the positon of center concept and hyponym boundaries

this paper designs a rule for hyponym extraction. Experiment result gets a higher accuracy rate and recall rate

confirming the validity of the method.