Abstract: The traditional urbanization mode driven mainly by industrialization has brought about rapid growth in carbon emissions. The new-type urbanization mode, characterized with people-centered, urban-rural integration, industry and city interaction, energy-saving and intensive, and suitable living conditions, has the potential advantages of low-carbon development. ow to promote the coordinated development between the construction of new-type urbanization mode and low-carbon development is an important issue in the current low-carbon transformation of Chinese cities and towns. This article tthe Yangtze River Delta urban agglomeration as an example, and use the coupling coordination model and geographic detector detection method to explore the process and mechanism of the coupling coordination relationship between new-type urbanization and low-carbon development. The results indicate that: （1) The overall trend of the coupling and coordination between new-type urbanization and low-carbon development in the is improving, forming a spatial pattern with Shanghai as the core; （2) The evolution and types of the coupling and coordinated development of cities significantly different. The  of the eastern cities faster than that of the western cities. Relatively speaking, the lag of new-type urbanization development s the main obstacle to the improvement of the coupling and coordination level of new-type urbanization and low-carbon development; （3) There s significant interaction between new-type urbanization and low-carbon development. During the study period, there s a significant increase the influence of new-type urbanization system on low-carbon development system, while the influence of the subsystem of low development driving force and low-carbon pressure on new-type urbanization system reduced slightly.