According to witnesses, a man removed the pickaxe from a guitar case about 3 a.m. and began swinging it at the star on Hollywood Boulevard, leaving chunks of concrete strewn across the sidewalk.
The suspect surrendered to Beverly Hills police at about 4:30 a.m., the LAPD said. His identity was not disclosed.
Crews were seen sweeping up the pieces.
In November 2016, days before the presidential election, Trump's star was similarly vandalized by a man dressed as a construction worker who used a sledgehammer and pickaxe.