To resolve the problem of 2D ISAR imaging of rotating micro-motion targets,firstly,this paper analysis the range-slow-time echo characteristics of rotating micro-motion and rigid parts.The Sine-Demodulation RWT based imaging algorithm for rotating micro-motion parts is proposed.The position parameters of rotating micro-motion scatters are estimated and their echoes are removed.The remained echoes,based on RWT,are used to reconstruct the rigid signals and ISAR imaging for rigid parts is performed by RD algorithm.Finally,simulation results have proved the validity of the proposed algorithm.