In recent years,more and more enterprises improve organization strategy ability and gain competitive advantages by improving organizational improvisation operation. This paper tries to construct a concept model concerning formation mechanism of organizational improvisation based on social network and organization learning theories. It takes enterprises with improvisation operation experience as the research object and analyzes the formation mechanism among firm social networks,organizational learning and organizational improvisation. The conclusions extend current organizational improvisation theories; it provides theoretical basis for further study of related topics of organizational improvisation and has some certain guidance of the improvement of organizational improvisation ability.