On the occasion of the 200th anniversary of Marx’s birth and the 100th anniversary of the founding of the Greek Communist Party under the circumstances of the structural crisis of imperialism and the reshuffling of cards，the continuous struggle for peace，democracy，equality and socialism，the 20th International Meeting of Communist and Workers’Parties was hosted by the Greek Communist Party. Representatives of 90 participating parties highly appraised the validity of Marxism，deeply analyzed the new changes in the international situation，correctly viewed the new changes of the working class，formulated the strategic plan and concrete action plan of the Communists in detail，and reached many consensus. This has played an important role in further promoting the development of the International Communist movement.