Abstract: The goal of “carbon neutrality” has provided brand-new opportunities and challenges for landscape architecture. Focusing on carbon source reduction and carbon sink increase, the two main functions of green space, this research puts forward specific measures for landscape architecture planning and design together with action mechanisms thereof, with a view to providing systematic, comprehensive and feasible strategies for landscape architects to carry out relevant practice. The research involves a total of 55 measures in the following three aspects: 1) in terms of direct carbon source reduction, minimize the whole life cycle carbon footprint of green space to help the project achieve energy conservation and carbon reduction; 2) in terms of carbon sink increase, enhance the carbon capture capacity of green space centering around the three major elements of landscape plants, soil and water bodies; 3) in terms of indirect carbon source reduction, guide residents to adopt a low-carbon lifestyle through green space, thus reducing urban energy consumption and indirectly achieving carbon emission reduction.