The United Federation of Teachers is asking a judge to restore $547 million Mayor Eric Adams has cut from the education budget as part of a 5% slash of spending at all city agencies — and stop him from making two more planned 5% cuts in the coming months.

“It is not easy to take this step, but it is unprecedented where we are,” Michael Mulgrew, president of the union, said at a press conference. “We have never had an administration try to cut their schools when they have historic reserves, and their revenues are all up.”

Adams has said the city faces a fiscal crunch due in part to the arrival of tens of thousands of migrants, many of them children attending school in the five boroughs. But Mulgrew says the mayor has failed to back up his claims about the cost of caring for the newly arrived families — and the costs that have been publicly accounted for don’t require such big spending cuts.

“These cuts are based off of a fiscal crisis that we feel is completely fabricated at this point,” Mulgrew said.

The lawsuit cites two different aspects of state law. The first is a provision requiring a “maintenance of effort” that’s part of the law granting the mayor control of city schools. The second is a section of the Contracts for Excellence law, which boosted state funding in exchange for lowering class sizes in the city.

“State law says very clearly that you cannot cut education funding when your revenues are up. You can only cut it if your revenues are down. Simply put, this fiscal year itself, our revenues are already up over $3 billion,” Mulgrew said. “Second, state education funding is here to supplement — supplement — local education funding, which means the city of New York cannot take its money out of education funding and replace it with state funding, which is what will happen if any of these cuts go through.”

The cuts planned for this year include $10 million in cuts to the community schools program, $3.5 million in cuts to the Computer Science for All initiative, and $6 million in reductions of per-session spending — money often used to pay staff for work they do after class or in the summer, like coaching teams or running clubs.

In the next fiscal year, which would begin in June, there’s a $120 million cut to universal pre-kindergarten funding.

The lawsuit comes on the heels of another one from the city’s largest municipal labor union, D.C. 37, which is arguing the city failed to properly weigh the impact of the cuts.

Adams said the arguments from both unions would be addressed in court, but said the suits didn’t indicate problems in relationships with the city’s labor leaders.

“From time to time friends disagree, and sometimes it ends up in a boardroom, and sometimes it ends up in a courtroom,” Adams said.

The mayor made those comments during an event highlighting what he deemed policies to help working people, but Mulgrew said cuts to education, especially pre-K, will only harm them.

“I guess he’s tone deaf?” Mulgrew said. “I don’t know.”