In this paper, we review the recent key results on anisotropic flow in heavy ion collisions at RHIC-STAR experiment. It mainly includes the results of elliptic flow of multi-strange and charm hadrons in top energy heavy ion collisions, and the results of elliptic and directed flow from RHIC Beam Energy Scan Program I. The results of 54.4 and 27 GeV are brand-new. We find the new results of directed flow follow the energy dependence trend; the Number of Constituent Quark scaling of elliptic flow indicates the partonic collectivity has been built-up in Au+Au collisions at 54.4 and 27 GeV. We als...
