Former Sao Paulo coach signed a contract until December 2026 and takes over following the sacking of Fernando Diniz.
"Today I am here representing the most winning team on the planet, the one that inspires many around the world. And it has the obligation to win again," Dorival told a news conference.
"Our moment is difficult. But nothing that is impossible to reverse quickly."
The five-time world champions have been going through a turbulent period since being knocked out from the 2022 World Cup in the quarter-finals.
That loss on penalties to Croatia led to the departure of coach Tite.
Brazil were then guided by Under-20 coach Ramon Menezes before the interim appointment of Diniz last year.
They have lost three of their six qualifiers to date, winning only two matches. They are sixth in the standings, trailing leaders and World Cup holders Argentina by eight points.
![South American qualifying standings South American qualifying standings](https://livesport-ott-images.ssl.cdn.cra.cz/r900xfq60/0acd1a9d-b6f7-4050-8ee7-31e226ebe607.jpg)
Dorival emerged as the leading candidate for the job after Italian coach Carlo Ancelotti extended his contract with Real Madrid following failed negotiations to manage the South American side.
"There is no one to blame. There is no interference, there is nothing like that. What we need from now on is to look for solutions," Dorival added.
"We need to deliver a reliable national team, one that gives us all credibility. Brazilian football is very strong, it reinvents itself. It cannot go through the moment it is going through. Let it serve as a lesson so we can find a new way forward."
Dorival's first match in charge will be a friendly against England on March 23rd.