President Correa celebrated the result of the exit polls as a personal victory Ecuadorean President Rafael Correa says he has won a referendum on a wide range of reforms.
Exit polls also indicated that voters had backed at least nine out of 10 referendum questions, which ranged from banning bullfighting to judicial and media reform.
Opposition politicians say the reforms are an attempt by President Correa to increase his power.
Analysts say that if confirmed, the results would be a boost to Mr Correa.
President Correa declared victory after two separate polls indicated a large margin of voters had voted in favour of the reforms.
“We’ve won by more than 20 points,” he said.
“The Ecuadorean people have triumphed, the truth has triumphed,” he added.
Opposition politicians had argued that some of the more controversial proposals, such as giving the president more of a say over judicial appointments, constituted a power grab.
While casting his vote, President Correa dismissed the opposition’s concerns.
“They’ve been saying it’s totalitarian… [a word] used for a state in which things are done by force. We’re doing this democratically,” he said.
Analysts say that an overwhelming yes vote would improve President Correa’s standing ahead of presidential elections in 2013, for which he could stand for a third time.
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