在作物生态适宜性模糊综合判评中 ,不同生态类型的生态因子组合状态、各生态因子的重要性、主导限制性因子不同 ,需要把权重向量扩展、改造为模糊权重矩阵 .本文根据系统结构决定系统功能的原理及边际生产力理论 ,探索出模糊权重矩阵的量化处理方法 .通过对陕南山区猕猴桃生态适宜性综合评判的具体应用 ,表明该方法能灵敏反映短线因子的限制性作用 ,符合实际状况 ,结论可靠 . In the fuzzy comprehensive evaluation of crop ecological suitability, the combination of ecological factors of different ecological types, the importance of each ecological factor and the dominant restrictive factor need to be expanded and transformed into fuzzy weight matrix.Based on the structure of the system System function theory and marginal productivity theory and explored the quantification method of fuzzy weight matrix.According to the concrete application of comprehensive evaluation of kiwifruit ecological suitability in mountainous area of ​​Shannan, this method shows that this method can sensitively reflect the restrictive function of short-term factor, in line with the actual situation , The conclusion is reliable.