The 1993–94 UEFA Champions League second round was the second stage of the competition proper of the 1993–94 UEFA Champions League, and featured the 16 winners from the first round.
The team that scored more goals on aggregate over the two legs advanced to the next round.
If the aggregate score was level, the away goals rule was applied, i.e. the team that scored more goals away from home over the two legs advanced.
If no goals were scored during extra time, the tie was decided by penalty shoot-out.
The draw for the second round was held on 1 October 1993 in Geneva, Switzerland.