French President François Hollande has said the "Jungle" migrant camp will be "completely, definitively dismantled", during a visit to the port of Calais, reports the BBC.
In a speech, President Hollande also called on the UK to "play its part" in managing the crisis.
Mr Hollande is meeting police, port officials, and politicians but is not expected to visit the camp itself.
The fate of the camp and up to 10,000 people living there has become central to France's presidential campaign.
Mr Hollande said that just because the UK had made a "sovereign decision" - an apparent reference to the UK's vote to leave the European Union - it was not "absolved from its obligations to France".
He said he was determined that the UK government would support the humanitarian effort, and said his own government was committed "until the end".
Between 7,000 and 10,000 migrants and refugees live in the Jungle amid squalid conditions, many of them hoping to enter the UK illegally by hiding on lorries crossing the English Channel.
Mr Hollande paid tribute to the efforts of local security forces, and said he had "a clear message for the traffickers: you won't be trafficking any more".