Trump announced the sneaker line Saturday ... under the moniker, "Trump Sneakers." He's calling them the "NEVER SURRENDER HIGH-TOP SNEAKER" with a price tag of $399.

Trump claims he's had the idea for more than 10 years, but it's pretty coincidental the kicks were unveiled a day after he was ordered to pay $355M for cooking the books of his company.

There are only 1,000 pairs being sold, so it won't come close to digging him out of the financial hole.

Trump made the announcement Saturday at Sneaker Con. The sneakers have a "T" and a "45" emblazoned on them.  And he's selling cologne and perfume at $99 a pop.

BTW ... the company that's selling the items is CIC Ventures LLC. It doesn't appear to be part of the Trump org, which would be problematic since the judge in the case said Trump can't do business in his New York-based company for 3 years.

BTW ... if he's thinking of picking RFK Jr. as his running mate, he should think again. RFK and his wife, Cheryl Hines made it clear on "TMZ Live" Friday that's not gonna happen.

And one more thing ... Trump launched on folks on social media for images of him they were using with belly in full display ... claiming the pic was a fake -- generated by A.I.