20111210-133226.jpgAllen Iverson’s divorce has taken a nasty turn — according to his estranged wife, the former NBA star went on a massive spending spree after she filed for divorce, leaving her completely penniless.

Tawanna just filed new docs in their bitter divorce battle — claiming ever since she filed for divorce in June, Allen stopped depositing money in their joint bank account … and then made several large cash withdrawals, including one for $20,000 … which he spent on diamond jewelry.

Tawanna claims the account was $23,000 in the red at the time she filed the court docs — and she’s been unable to pay the bills … or provide for their 5 kids.

According to Tawanna — who says she gave up her career to be a stay-at-home mom — Allen is worth over $20 million … and refuses to help her out simply out of spite.

Allen denies Tawanna’s allegations in the docs — and since they’re at a stalemate … the judge will have to play peacemaker. So far, no hearing date has been set.