The Parkhead player has been served with a notice of complaint following Sunday's Old Firm game at Parkhead.
Christie has been charged with allegedly grabbing Rangers striker Alfredo Morelos' groin area in the 60th minute of the Gers' 2-1 Ladbrokes Premiership win.
The sanction for breaching rule 200, A2 is a two-game ban and the Scotland international's hearing is on January 6.
In response to the charge, Celtic said in a statement reports by Sky Sports Scotland: “We are absolutely astonished at this decision. Clearly we will defend Ryan vigorously.”