The 1970–71 season of the European Cup Winners' Cup football club tournament was won by Chelsea in a replay against Real Madrid. Defending champions Manchester City were eliminated by Chelsea in the semi-finals, only the second ever tie in the competition between two clubs from the same country. These two sides would later compete in the 2021 UEFA Champions League final, with Chelsea winning 1-0. The final was played in Karaiskakis Stadium in Piraeus, Greece.

Bracket

Preliminary round

First round

First leg

Second leg

Zürich won 14–1 on aggregate CSKA September Flag won 11–1 on aggregate. Steaua București won 4–3 on aggregate. Benfica won 9–2 on aggregate. 1–1 on aggregate; Vorwärts Berlin won on away goals. Cardiff City won 8-0 on aggregate.

Second round

First leg

Second leg

Club Brugge won 4–3 on aggregate Chelsea won 2–0 on aggregate. PSV Eindhoven won 7–0 on aggregate. ''2–2 on aggregate. Vorwärts Berlin won 5–3 on penalties.''

Quarter-finals

Semi-finals

First leg

Second leg

Chelsea won 2–0 on aggregate. Real Madrid won 2–1 on aggregate.

Final

Replay