Bell-Drummond, whose previous deal had been set to expire at the end of the season, has scored 4,268 runs in first-class cricket an average of 35.86.
Details of the length of the 23-year-old England Lions international's new deal have not been disclosed.
"It's an exciting time for the club and I want to contribute to some success for our supporters," he said.
"I want to play for England one day and I feel my game is progressing well with the support of [head coach] Matt Walker and the Kent coaches."
Kent batsman Daniel Bell-Drummond has signed a contract extension with the County Championship Division Two club.