The frosty split between Rudy and Judi Giuliani devolved into a wreck-the-halls battle Thursday — as she accused him of swiping her Christmas decorations and he griped that she took his cable box.

The Christmas-in-July jousting erupted in Manhattan’s Divorce Court as the onetime power couple turned from battling over millions of dollars in assets to more pressing issues — the whereabouts of her colossal toy soldiers and his TV remotes.

Judi “has a huge walk-in closet of decorations” that Rudy is holding hostage, a friend told The Post, referring to a holiday stash that Judi kept at their condo at East 66th Street and Madison Avenue before their split.

“Many of them were family heirlooms,” including a set of irreplaceable blown-glass Christmas tree ornaments belonging to Judi’s grandmother, the pal said.