The campus has been named as 'AP Government Transitional Headquarters'.
With six blocks under construction on a war footing, the government hopes to shift its functional base to Velagapudi from Hyderabad by June 15.
One of the blocks will be for the state legislature and its next session will be held in the new capital only.
Since no auspicious date is available in the next few months, Naidu formally inaugurated the complex early yesterday morning.
Naidu later conducted a meeting with officials from the Japan International Cooperation Agency for expediting the lending process for the Amaravati Metro Rail project to be taken up in Vijayawada city.