Katt Williams Sued by Former Female Employee

Katt Williams' ex-assistant says he attacked and knocked her so senseless, she was laid up in a hospital for days ... and now she's suing him for big money.

Angelina Triplett-Hill says the oft-arrested comedian flew into a rage in 2014 while they were on a movie set in L.A. According to the lawsuit, Katt got pissed when she took a phone call, and violently lunged toward her and ordered her into a van.

She says Katt snatched the phone out of her hands and lobbed it inside the van. Triplett-Hill says she became frightened and fearful because she claims she'd previously seen Katt violently beat other women in her presence.

In the docs, obtained by TMZ, Triplett-Hill says Katt called her a bitch and got even more enraged when she repeatedly told him ... he's "bigger than that." She says that's when Katt hit her in the face, slamming her to the ground and knocking her unconscious.

Triplett-Hill says she spent 3 days hospitalized after the attack and immediately quit. She's suing Katt for physical pain and damages in excess of $1 million.

We reached out to Katt, so far no word back.