With the rapid development of renewable energy generation technologies and electric vehicles，flexible DC loads such as distributed power sources are increasing daily，posing unprecedented challenges to the flexibility and compatibility of power systems. Therefore，researches of a novel topology structure for AC-DC hybrid distribution network with high efficiency，flexibility and strong adaptability is a key focus. Considering the advantages in renewable energy consumption and DC load access of AC-DC hybrid distribution network，and a novel topology structure for AC-DC hybrid distribution network is proposed，which adopts a double-bus structure and a two-terminal power distribution-like structure at high voltage levels，while a radial-like structure is used at low voltage levels，with the bus voltage being reduced in turn to adapt to electrical facilities. Accordingly，the characteristics of the proposed new hybrid topology structure are compared and analyzed with traditional radial structure，two-terminal distribution structure and ring structure，and its rationality and feasibility are explained. The simulation analysis results show that the proposed structure has significant advantages in power transmission efficiency，power supply reliability and economy