The UK government has pledged £12m to help France tackle the problem of illegal immigrants trying to enter Britain through Calais, reports BBC News.
A plan announced by Home Secretary Theresa May and French counterpart Bernard Cazeneuve will see the two countries work more closely.
Security will be bolstered at the port, which has seen increasing numbers of migrants gathering in recent months.
New technology may be introduced to detect migrants hiding in lorries.
Other measures include building more robust fences as well as increasing security in the car park area of the French port.
Immigration Minister James Brokenshire said British and French law enforcement agencies would also target organised crime gangs behind people trafficking and smuggling.
Tensions have grown in Calais in recent months as the number of people gathering there has risen.
France believes there are 1,500 illegal immigrants in Calais, the numbers having increased by 50% in the past year as people flee from humanitarian crises in northern and eastern Africa and the Middle East.
The UK is to contribute five million euro (£4m) a year for three years to a joint intervention fund.
In a statement, Mrs May and Mr Cazeneuve, France's minister of the interior, said they would "ensure that all measures taken will deter illegal migrants from congregating in and around Calais".
They promised to "respond to health emergencies and protect vulnerable people", including people trafficking victims, but insisted the measures would not encourage migrants to gather at the port.
The ministers said their efforts will aim to identify measures to ensure migrants do not breach the laws of either country or threaten the safety of Calais residents or those using the port.
Mrs May and Mr Cazeneuve have also pledged to push for European Union action on what they described as an "evident migration crisis" in the Mediterranean Sea.
As part of the agreement, the layout of the port will be changed to make it easier to carry out controls and improve traffic flow.
Read more of this report from BBC News.