In the context of global climate change, constructing, maintaining, and managing garden landscapes under a low carbon concept is vital for achieving the "double carbon" goals in cities. "Energy saving and emission reduction" is a prominent research topic in the landscaping field. This paper summarizes research advancements in afforestation in China and outlines the technical framework for urban landscape afforestation. It aims to provide a reference for developing a garden greening system with a significant carbon sink function in China. Currently, the technological system for increasing carbon sinks and reducing carbon emissions is mainly categorized into two aspects. The carbon sink enhancement system primarily includes expanding green areas, establishing plant communities with high carbon storage capacity, and increasing soil organic matter content. The emission reduction system involves various technical solutions and the use of renewable energy throughout the production, construction, and management stages of landscaping. The urban landscaping industry should fully utilize new technological means, develop systematic standards and norms, and improve the management and analysis of monitoring data. This will guide the low-carbon construction and operation of urban landscaping, enhance carbon sequestration capacity, and promote the synergistic effects of landscaping in reducing pollution and carbon emissions.