The 1970-71 KNVB Cup was the 53rd edition of the Dutch national football annual knockout tournament for the KNVB Cup.
51 teams contested, beginning on 15 August 1970 and ending at the final on 20 May 1971.
Ajax successfully defended its 1971 title achieving its sixth KNVB title defeating Sparta, 2–1.
Cupholders Ajax E received a bye for this round.
The following clubs received a bye: Fortuna Sittard, FC Twente, Holland Sport, HFC Haarlem, Sparta Rotterdam and SC Drenthe.