  Strange hadrons, especially multi-strange hadrons are good probes for the
early partonic stage of heavy ion collisions due to their small hadronic cross
sections. In this paper, I give a brief review on the elliptic flow
measurements of strange and multi-strange hadrons in relativistic heavy ion
collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider
(LHC).
