In this paper, aiming at the asteroid mining system, it is very meaningful to discuss how to distribute these space resources fairly on a global scale. First of all, this paper constructs the efficiency allocation model (EODM), which only considers the incentive effect. At the same time, in order to verify whether our fair distribution model (EDM) can make the world more fair, we establish the global equity model (GEM), evaluate the two models, and verify them by calculating the equity share of the two models. Then through the establishment of the three dimensions, there are 3-4 indicators to quantify. These 10 indicators are included. Through the score of these 10 indicators, the proportion of each country in the allocation can be calculated. To simplify the calculation, we assume that only 10 countries in the world participate in the distribution system. According to the collected data, the grey prediction and time series prediction methods are used to predict the situation of these 10 countries in 2030, and then calculate the impact of asteroid mining on distribution. In the next step, we will measure the distributed impact of asteroid mining by the asteroid resources that can be allocated to countries, and use the global equity model to measure the fair scores of EODM and EDM, and verify that our optimized redistribution model can promote global equity.