Britney Spears' legal team wants a judge to tell Kevin Federline he's wasting his time asking to depose the singer ... calling it unnecessary and possibly harmful to their kids.
Attorneys for Britney's conservatorship just filed new legal docs -- obtained by TMZ -- saying there's no need for Britney to sit for a deposition because everyone already knows, she makes a ton of money.
Brit's team also argues the depo could disrupt her touring schedule and potentially undermine the security of her kids if Kevin asks for records that expose private information -- like their travel, school schedule, etc.
She's asking a judge to severely limit what Federline can access ... and to seal whatever does become available.
TMZ broke the story ... Britney's legal team squared off with Kevin in L.A. last week. She's been paying him $20k per month in child support but he's demanding more.