Th e paper aims at the overview of the main approaches of state support implemented by developed and developing countries and the assessment of their distorting infl uences on the trade with agricultural commodities. Th e current state of state support is analyzed on the examples of EU-27, the USA and Japan. Th e experiences of developing countries are summarized on the examples of China, Russia and the CIS countries. State support tools are grouped according to the WTO classifi cation. Th e alternative classifi cation is implemented in order to compare the distorting eff ects caused by the state support. Th e EPACIS model is implemented to analyze the eff ects of trade liberalization for the distribution of agricultural commodities and trade policies in developing countries. Th e model is adjusted in order to assess the eff ects of state support for the production and trade with agricultural commodities in developing countries, recently accessed the WTO (the case of Russia). Imitation calculations allow formulating policies for the developing agricultural markets depending on the degrees of their sensitivity to foreign trade regulations and domestic support.