6:08 AM PT -- Steve's attorney Brandon Williams tells TMZ, "Mr. Harvey vehemently denies any allegations set forth in the lawsuit. The Complaint is meritless, frivolous and the allegations are completely false. We will vigorously defend/counterclaim against the Complaint."
Steve Harvey has caused his second ex-wife much more than mental anguish ... according to a new lawsuit she's filed he damaged her "soul" and now owes her $60 MILLION.
Mary Harvey and Steve's infamously bitter divorce was finalized back in 2005, but according to docs filed Wednesday ... Mary's still feeling a slew of ill-effects from their battle. She says she's been suicidal and self-medicates to cope with their nasty breakup.
The suit is rambling at times, but Mary's main point is she's emotionally and physically destroyed after losing her son, her businesses, and the joy of Mother's Days. As she puts it, "All was loss Mary L. Harvey was dead."
She's suing Steve for child endangerment, torture, conspiracy against rights, kidnapping, murder, breach of contract and intentional infliction of emotional distress.
Worth noting ... the document was not filed by a lawyer, but rather a woman who tells us she is Mary's "civil rights activist."