Nikki Bella is tapping out when it comes to her marriage ... because she just filed to divorce Artem Chigvintsev ... only weeks after he was arrested for domestic violence.
The retired WWE star beelined it to court Wednesday and filed for divorce after 2 years of marriage ... according to online records.
The divorce filing comes nearly 2 weeks after Artem was arrested Aug. 29 for felony corporal injury to spouse or cohabitant allegedly attacking Nikki -- resulting in a visible injury that triggered his arrest.