Abstract: Strategic alliance enterprises of agricultural industrialization in Heilongjiang province is still in its infancy, affect the stability factors threaten union competitiveness, so it is very important factor of influence the stability of strategic alliance. The author in connection with the actual characteristics of Heilongjiang Province union in many scholars research foundation, analysis of partner selection matching, trust risk, cultural fit, the external environment of the 4 factors were the main factors that influenced the stability of strategic alliance enterprises of agricultural industrialization in Heilongjiang Province, using game theory analysis and found out the root of unstable factors, put forward the correct choice of alliance partners, establishing detailed contract system, strengthen cross-cultural learning exchanges, enhance the ability to adapt to the external environment to enhance strategic alliance of enterprises of agricultural industrialization of Heilongjiang Province, to provide reference for the improvement of comprehensive strength of enterprises of agricultural industrialization in Heilongjiang Province.