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The global world has been paying great attention to the issue of space resources. To measure global equity, according to the dominant criteria, this paper selects resources, economic, opportunity, and policy indicators by using the entropy weight method to calculate the information entropy and weight of each indicator, to measure the degree of equity. In the future exploitation of space resources, in terms of financing and returns, this paper uses the global equity model, and to calculate the maximum mining returns, this paper uses linear programming. The results show that the maximum benefit is $20.01 million per ton.