Abstract: Many researchers hold this option that event accords with human normal cognitive rules and is the basic unit of human cognition. It is event which uses a verb as event core that constitutes the basic unit of dynamic process description while putting the entity concepts into organic links and organization to enrich static contact between them. But knowledge of event can not easily and directly acctuire from text. A method based on one event as core event to mine events which arc associated with the core event was proposed. It acquired associated event's chunks by extend binary words to multiple more semantic words on the basis of the full use of parsing, and then tagged role of the event's chunk and finally discovered roles relationship between of associated event and core event. The experimental results show that the proposed method has acquired considerable associated events and roles relationships from restricted corpus and has achieved a higher precision.

Key words: Event, Associated event, Roles relationship, Knowledge acquisition