On 1 November 1970, Cork won the championship following a 5-17 to 0-8 defeat of Wexford in a replay of the All-Ireland final.[1] This was their 4th All-Ireland title in the grade and their third in succession.
Wexford's Mick Butler was the championship's top scorer with 6-30.
Changes
In keeping with their senior and minor teams, Galway's under-21 hurlers left the Munster Championship where they had been playing since 1964. Having no competition in their own province, Galway received a bye to the All-Ireland semi-final stage.