In recent years, renewable energy integration to power grids with high penetration is facing an obvious phenomenon of abandoning wind and solar energy. Microgrid provides a good platform for the full utilization of renewable energy, and the coordinated scheduling of multi-microgrids in Active Distribution Network (ADN) would further improve the utilization efficiency of renewable energy. Based on the combination of hierarchical control and the parallel operation of multi-microgrids in AND, a two-step hierarchical dynamic scheduling strategy is proposed, in which microgrids are optimized after the AND optimization to maximize their coordination capability. The information interaction process between the energy management center of the distribution network and that of the microgrid is also addressed to maximize the utilization of renewable energy and to reduce the interaction power between ADN and the main grid, as well as to ensure the economical operation of microgrids. Finally, an ADN with multi-microgrids is analyzed to verify the correctness of the proposed strategy. Comparison results show that the strategy has advantages in making full use of renewable energy, reducing scheduling time and interactive power between ADN and the main grid and shortening optimization time. This work is supported by National Key Research and Development Program of China (No. 2016YFB0900203), Natural Science Foundation of Hebei Province (No. E2018502063), and Fundamental Research Funds for the Central Universities (No. 2017MS096).