 Born 26 October 1891 in the Solikamsk District, Perm Governorate, Russian Empire, Beloborodov's parents were workers employed in the Alexandrovsk Factory in Solikamsk.He left school at 14 to work in a factory as an apprentice electrician.He joined the Bolsheviks in 1907, and created a local revolutionary organization in Solikamsk while working as an electrician in a mine.