Evaluation and Reconstruction of World Food Security System

Recent events have shown that there are big loopholes in the global food system. In order to analyze the pros and cons of the existing model, we have analyzed the evaluation and construction of the food system according to the following logical thinking to highlight the sustainability and fairness of the food security system. Firstly, this thesis uses the Entropy Weighting Method to evaluate, compare and analyze food security in each country, for the convenience of the model, we randomly sampled the top 73 countries in the world's comprehensive strength rankings and selected 33 samples. According to the four goals we are going to discuss: efficiency, profitability, sustainability, and fairness. 14 specific secondary indicators are selected. Combined with the DEA model, we further scored the preliminary model. Secondly, we select the United States and China as representatives and bring them into the model for calculation. It is found that the improvement of the model makes developed countries no longer have an advantage in comprehensive scores. It can also indicate that in the current food system, developed countries are more concerned about efficiency and profitability, which to some extent leads to weaker sustainability and fairness.