According to new legal docs ... Brandi Garnett is seeking $146,000 per month in spousal support, plus another $46k monthly in child support for their 2 daughters -- ages 10 and 6. Brandi says she has the girls 95 percent of the time.

Do the math ... and that's more than $2.3 million per year. Brandi says that's fair, though, because she claims KG's still hauling in at least $5 mil a year ... on top of having earned more than $300 mil in his NBA career.

Brandi's also asking for $300k in attorney fees immediately to cover the cost of the divorce proceedings so far and estimated future costs to hammer out an agreement.

There's more -- according to the docs, Brandi's requesting an additional $25k to retain counsel in another financial matter involving Kevin allegedly getting swindled out of $77 MILLION. As we reported, KG claims his former accountant worked with a crooked wealth manager to steal a fortune from him over several years.

Brandi filed for divorce from Kevin in July after 14 years of marriage, citing irreconcilable differences.