Residential landscape is the most common source of urban green space carbon sink that people come into contact with in daily life, which is of certain significance for achieving the goal of “carbon neutrality”. In addition to the carbon sink function of plants, urban landscape also includes carbon emissions during the production of landscape materials, construction, use and maintenance. This study took the residential area of Znternatioal City Community as an example, calculated the carbon emissions of the whole life cycle of the landscape through field investigation and reference to the corresponding standard carbon emission factors, and revealed that the landscape material production stage accounted for the largest proportion of total carbon emissions (47.08%), followed by the landscape construction stage (27.68%). Referring to plant unit leaf area and carbon sequestration per unit leaf area, the annual carbon sequestration amount of plant landscape in residential area was calculated as 2 530.36 t. By analyzing the mutual conversion process of carbon source and carbon sink, it can be concluded that the residential landscape has reached the carbon balance state in the 48th year after the construction of the residential landscape. Based on the analysis of the carbon balance of the whole life cycle of residential landscape, this paper puts forward the strategy of reducing emission and increasing sink of residential landscape under the concept of low carbon, and then discusses the evaluation system of low carbon landscape, which provides practical reference for the construction of sustainable urban landscape.