The implementation of the new urbanisation strategy promotes the construction of resilient cities, which is an important force to promote the sustainable development of the region. Based on the five dimensions of population development, economic development, social development, ecological development, and the development of residents' life, an evaluation index system for the level of new urbanisation was constructed, and the time and space of the development level of new urbanisation of the Pearl River Delta were analyzed as an example. The time and space evolution characteristics of its new urbanisation development level were analyzed. The results showed that the development level of new urbanisation in the Pearl River Delta shows an upward trend from 2013 to 2022, but the development is unbalanced among cities. In time, the comprehensive score of new urbanisation in the Pearl River Delta rose year by year from 2013 to 2022, with the average annual score increasing from 0.354 to 0.498, and the growth rate of the development level fluctuating greatly. Spatially, the spatial changes in the level of new urbanisation in the Pearl River Delta in 2013, 2018 and 2022 are small, with large regional differences, showing a spatial pattern of slowing down from the central to the eastern and western regions.