ku
Kentucky Wildcats, 129 games from 1943-1955
Uconn
THE Wyoming Cattle
Kentucky.
Memphis Tigers
towson university
"60 games by the 1955-57 University of San Francisco squad led by Bill Russell"
Utah state
Syracuse
KU 59 as of 3/3 2010
There is no winning streak in the tournament as Ky the 2012 champion did not make the tournament this year.
UCLA has the longest overall winning streak. However the Butler Bulldogs have the longest CURRENT winning streak in men's division 1 college basketball. As of 3/26/2010 Butler has 23 consecutive wins.