'SURVIVOR' STAR KAT ARRESTED FOR BATTERY Allegedly Whacked BF's Face

A 2-time 'Survivor' contestant is facing a battery charge after getting into an argument with her boyfriend and hitting him in the face.

Kat Edorsson was arrested early Saturday morning at an apartment complex by the Orlando PD after cops responded to a battery call. According to the police report ... Kat and her boyfriend were arguing in the lobby, and the security guard saw her strike him in the left side of his face.

Cops say the BF didn't retaliate and didn't want to press charges, but because she was determined to be the "primary aggressor" according to a witness ... she was arrested anyway.

Edorsson's facing a dating violence battery charge. She appeared on 'Survivor' seasons 24 and 27.