面对市场的激烈竟争 ,企业如何制定一个风险小收益大的经营战略 ,至关重要。本文给出了水产企业集团多元化经营系数的定义及其性质 ,研究了水产企业集团多元化经营的经营机制 ,建立了多种行业投资收益与风险的数学理论方程 ,并对其多元化经营的收益与风险之间的关系进行测度 ,给以量化分析 In the face of fierce competition in the market, how to formulate a business strategy with big risk and small profit is crucial. This paper gives the definition and nature of the diversification coefficient of aquaculture enterprise groups, studies the management mechanism of diversification of aquaculture enterprise groups, establishes mathematical theory equations of investment returns and risks of many kinds of industries, The relationship between revenue and risk is measured and given a quantitative analysis