Under the background of global politicisation and economisation, international trade has become the main mode of communication among countries. With the explosive growth of international trade volume, human society will face trade discrimination and inequality, so human beings have set up the International Trade Organisation (ITO), which supervises the process of international trade and formulates the relevant international economic laws in order to better guarantee the sustainability of the economic cycle and protect the rights and interests of the disadvantaged countries. However, as time goes by, we can see that in reality most developing or third world countries are still unable to defend their legitimate interests and are at a disadvantage in most transactions. So this study will be based on the difference in the strength of the different countries and the structural shortcomings of the Global Trade Organisation. This paper will analyse why disadvantaged countries are still unable to obtain equal opportunities for development in the international community, which now has a more comprehensive legal system.