The cinema of the Soviet Union includes films produced by the constituent republics of the Soviet Union reflecting elements of their pre-Soviet culture, language and history, albeit they were all regulated by the central government in Moscow. Most prolific in their republican films, after the Russian Soviet Federative Socialist Republic, were Armenia, Azerbaijan, Georgia, Ukraine, and, to a lesser degree, Lithuania, Belarus and Moldavia. At the same time, the nation's film industry, which was fully nationalized throughout most of the country's history, was guided by philosophies and laws propounded by the monopoly Soviet Communist Party which introduced a new view on the cinema, socialist realism, which was different from the one before or after the existence of the Soviet Union.

Socialist realism was the official cultural doctrine of the Soviet Union that mandated an idealized representation of life under socialism in literature and the visual arts. The doctrine was first proclaimed by the First Congress of Soviet Writers in 1934 as approved method for Soviet cultural production in all media. Following World War II, socialist realism was adopted by countries politically aligned with the Soviet Union. The primary official objective of socialist realism was "to depict reality in its revolutionary development" although no formal guidelines concerning style or subject matter were provided.