Abstract: During the climax period of agricultural cooperation movement in 1956-1957, the first large-scale collective event occurred in the countryside after 1949. This event had characteristics of wide distribution,long lasting, a high degree of unanimity on purpose, intertwined with the reasonableness of the request and illegality of activities, and with confrontation and harmfulness of partial. This article discussed the main reasons of the event and its solution. At the same time, the authors proposed the lessons of history worthy drawing.