Transmission belt is a Marxist–Leninist principle that tries to create an information flow from the communist party to the people and from the people to the communist party in a communist state by creating interlinked institutions. A transmission belt was to be established either in the form of a mass organisation or an officeholder that would link the two, literally working as transmission belts between the party and the masses. These institutions worked under the party's leadership.[1] To take an example, the All-Union Central Council of Trade Unions of the Soviet Union and the All-China Federation of Trade Unions, were and are transmission belt organisations, but so was also the elected deputies to the highest organ of state power.[2]
Adam, Jan (2016). Why Did the Socialist System Collapse in Central and Eastern European Countries?: The Case of Poland, the Former Czechoslovakia and Hungary. Palgrave Macmillan. ISBN978-0-312-12879-1.