Abstract: "Small block" is the block space form of low carbon ecological city. Firstly, it analyzed not only the origination of small block idea but also its road grid characteristics; block scale and public transportation form which adapted to the low carbon urban construction. Then, the urban design concept of Tingjiao area of Nansha is expounded with the local feature of Lingnan Shanshui. Building the space structure based on the small block, the project shows characteristics on open space, hill and water landscape and transport system, which provides practical case for urban design that highlight the characteristics of small block.