| Tourney Name: | European Cup Winners' Cup |
| Year: | 1970–71 |
| Champion Other: | Chelsea |
| Count: | 1 |
| Second Other: |  Real Madrid |
| Prevseason: | 1969–70 |
| Nextseason: | 1971–72 |
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 finals were played in Karaiskakis Stadium in Piraeus, Greece.[1] [2] [3]
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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.
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Chelsea won 2–0 on aggregate.----PSV Eindhoven won 7–0 on aggregate.----2–2 on aggregate. Vorwärts Berlin won 5–3 on penalties.
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Chelsea won 2–0 on aggregate.----Real Madrid won 2–1 on aggregate.
See main article: 1971 European Cup Winners' Cup Final.