Foreshadowing Britain's vote to leave the 28-nation bloc in June, the Nordic country last December rejected a government proposal for new laws needed to keep the country inside the European police agency. Since then, the government has sought a compromise to maintain police cooperation with the EU.
The deal is expected to be confirmed on Thursday when Danish Prime Minister Lars Lokke Rasmussen and EU leaders meet, on the sidelines of a regular EU summit, officials said.
Rasmussen has a mandate from all parties in the Danish parliament to strike a deal, a source said.
As full members of Europol, Denmark could automatically access its database.
The draft deal will allow it to request data from an Europol agent as long as it remains a member of the border-free Schengen area.
The database is crucial to acquire information from other EU police forces.
As part of the accord, Denmark committed to remain a member of the Schengen area, the officials said. The Danish government and Europol declined to comment on the negotiations.