Abstract: At present，Gansu Province mutton sheep’s each link disharmony inconluding production，slaughtering，processing，storage sale and so on exists generally.  The establishment about sheep breeding association and the cooperatives have just started.  Mutton sheep industry chain linking is not good.  The main body between participators of mutton sheep industry lacks of effective linking mode.  Industrial organization model development lags behind. Therefore，combined with the actual situation in Gansu Province，choosing one or more organization models is very important. So，what kind of mutton sheep industrial organization in Gansu Province mainly have? what factors influence farmers’ choice of the mutton sheep industry organization?  How answer to these questions have theoretical and practical significances. In theory，farmers can’t allow to ignore the perspective analysising，only it can assure mutton sheep slaughtering，processing and sales. With the continuous development of mutton sheep industry，in the face of different organization mode，farmers should have the first choice. Through practical investigation，this paper sums up Gansu Province’s main forms of the mutton sheep industry organization mode at present，the influence factors of farmers choosing different mutton sheep industrial organization model，and the restriction and hinder of the key factors of farmers choosing different mutton sheep industrial organization mode. What is more，in the existing study，the organization modes involving specific mutton sheep industry are less，the more existing study gives the priority to the existing organization patterns and Inner Mongolia，Xinjiang and so on are mostly chosen as the research areas. In addition，most of the existing research puts attention to analyze farmers own characteristics，production and operation characteristics. The research on government support condition is brought forward rarely. Based on the survey data of 200 mutton sheep breeding fivariate logistic econometric model，Gansu Province is selected as a study area with the purpose to analyze the influencing factors of farmers choosing mutton sheep industry organization mode from four aspects，including farmers householder characteristics，production and operation characteristics，sheep breeding investment and government support. The results show that: from the view of the farmers，the government support and the production and business operation feature mainly influence farmers choosing organization mode.  Among them，the government subsidy and the establishment of cooperative association have great effect; the feeding size，farming income and sales mode are ranked the second..  The influence significant level of farmers culture degree，breeding sheep’s source，forage grass supply and labor input are low and their effections are small.  The rest factors have no effect on the breeders choice behavior.

Key words: Gansu Province, mutton sheep industry, organization mode, influence factors