The figures, published for the German broadcaster ARD, found 49 per cent of respondents said they will vote for the current Chancellor.
Her previous work as Chancellor is said to be a driving force behind Mrs Merkel’s surge in support, according to German media.
The poll showed 63 per cent of respondents are pleased with her work, and 72 per cent of those voters back her because she “ensures the people in the country are doing well”.
Other satisfied respondents claimed she ensures that Germans “are doing well in a restless world”, but 52 per cent said she is set to experience her worst days.
The elections are due to take place in September, but Martin Schulz’s support-base has been fast-depleting.
While Mrs Merkel’s has enjoyed a surge in support, only 42 per cent of respondents approved of his previous work, the broadcaster reports.
Mr Schulz rose to prominence with his Europhile views last year.
Announcing his election campaign, the former president of the European Parliament said he was prepared to abandon the crumbling bloc.
He added: “Those who do not want the United States’ protection policy, and who do not want Brexit to win must be committed to deepening the Eurozone.”
The polls come amid claims that Vladimir Putin is out to destroy Angela Merkel by hacking the German election.
Garry Kasparov, who fled Russia to New York after being hounded out of his home country for opposing Putin, claims the Russian leader sees the removal of Mrs Merkel as the key to crushing the European Union.
Mr Kasparov, 54, said: “Putin is all about destruction. Putin wants to absolutely prevent Merkel’s re-election.
“Merkel is the key figure of the EU. Putin knows: As long as Merkel exists, the sanctions remain. The Soviet Union presented an alternative ideology. Putin is not an ideologist, he’s all about destruction.”