China's main banks have seen further changes made to their top executive positions, in what are being seen as the latest steps to speed up reform of the country's leading financial institutions.

Bank of China Ltd, the country's fourth-biggest lender, on Monday appointed 54-year-old Tian Guoli as its new Party chief, one month after former chairman Xiao Gang took over as the country's top securities regulator.

Tian, who was former chairman of China Citic Bank, was listed on BOC's website as Party secretary. As is customary, he is also expected to become chairman.