Abstract: The fragmentation of the current administrative system is incompatible with the overall characteristics of regional environmental issues，forcing intergovernmental cooperation on ecological and environmental protection. However，the imbalance between the contribution of partners and the distribution of benefits leads to negative effects of cooperation or selective attention. Based on the fuzzy decision theory， the evaluation subject is optimized from the perspective of public value and stakeholder participation，and the index system is constructed from the perspective of value creation. The combined weighted arithmetic average operator is used to aggregate attribute information，and the subjective and objective comprehensive weighting method is applied to construct the contribution measurement model of the collaborators. Combined with the actual case of ecological protection in the rare earth mining area in southern Jiangxi，the benefit distribution scheme is effectively optimized. The program is conducive to promoting the stability of cooperative organizations，reducing the negative effects of organizations，and promoting the ecological pro⁃ tection of mining areas.

Key words: contribution degree, mineral ecology environment, benefit distribution scheme, fuzzy decision