The 1970 NHL expansion draft was the second expansion draft of the National Hockey League (NHL). The draft was held on June 10, 1970, a day before the 1970 NHL amateur draft. The expansion draft was held to allow the Buffalo Sabres and Vancouver Canucks to acquire players for the upcoming .
Each expansion team was to select twenty-one players from the established clubs, three players from each of the fourteen existing teams: two goaltenders and nineteen skaters. Thus, a total of 42 players were selected.
Most of the existing teams could protect two goalies and fifteen skaters. First-year pros were exempt. The existing teams could lose only a maximum of three players, including a maximum of one goaltender.
The following trades involving drafted players were made before the start of the .