Henan is an important province of pig production, the development of pig industry has a positive effect to improve farmers' income, promote rural development and promote agricultural modernization. In the stage of the pig industry to scale, standardization and industrialization, there is a problem we are facing is How to promote the level of vertical cooperative and improve the competitiveness of pig industry based on the situation of Henan. Based on the transaction cost theory, the study analyzes the factors for pig farmers to select the different vertical cooperative modes use of Multi-choice Model and holds that transaction costs affect the farmers to choose different vertical cooperative modes. There is a significant positive correlation between pens area and investment funds with the selection of vertical cooperative mode; Under transaction uncertainty indicators, there is no effect between age of householder, educational level and enjoy the policy with the selection, and there is a significant negative correlation between farming experience and technical risk with the selection, and there is a significant positive correlation between information obtained capabilities, financial risk and disease risk with the selection; Under frequency of transaction indicators, there is a significant positive correlation between slaughter capacity and the selection.