The competition started on April 11, 1985, and concluded on June 15, 1985.

Due to time constraints, saturation and club pressure, the Copa de la Liga only lasted four years from its introduction in 1982, being cancelled in 1986.

The Copa de la Liga was played by 18 teams of 1984-85 La Liga and the 4 winners of 1984 Copa de la Liga of Segunda División, Segunda División B and Tercera División.

The team that had the higher aggregate score over the two legs progressed to the next round.

The 1984-85 Copa del Rey winner was exempt until the quarter-finals and the 1984-85 Copa del Rey quarter-final losers were exempt until the second round.