With rapid economic development and increasing population, the urbanization process is accelerated, and serious air pollution threatens human health. Urban green infrastructure (UGI) planning has proven effective in improving air quality. However, how to improve air quality through UGI planning in different urban forms remains unclear. Therefore, based on the local climate zone (LCZ) of Guangzhou, this study used the i-Tree Eco model to evaluate the removal efficiency of air pollutants under different UGI designs. The results showed that from 2013 to 2019, the Built Type LCZ gradually replaced the Land Cover Type in Guangzhou, indicating the rapid urbanization process. The air pollution of the Built Type LCZs was more serious than that of the Land Cover Type. Roadside green space was more effective for air quality improvement when applied on a larger scale with the more addable area, while applying city park green space was an alternative at a local scale with limited area. The optimal designs of UGI varied within different LCZs. Adding street trees and shrubs by 20% in the urban expansion area was the optimal design for LCZ 6. For LCZ 4, adding 20% of city park trees in the urban expansion area and 5% of overall shrubs were optimal. This study proposed a practical approach for colligating the LCZ concept and i-Tree Eco simulation for air quality improvement.

随着经济的快速发展和人口的增加，城市化进程加快，严重的空气污染威胁着人类健康。城市绿色基础设施 (UGI) 规划已被证明在改善空气质量方面是有效的。然而，如何通过不同城市形态的 UGI 规划来改善空气质量仍不清楚。因此，本研究以广州当地气候区（LCZ）为基础，采用i-Tree Eco模型对空气污染物去除效率进行评价。在不同的UGI设计下。结果表明，2013年至2019年，广州市建筑型LCZ逐渐取代土地覆盖型，表明城市化进程迅速。建造型LCZ的空气污染比土地覆盖型更严重。路边绿地在可增加面积更大的范围内应用时，对空气质量的改善更有效，而城市公园绿地在面积有限的局部范围内是一种替代方案。UGI 的优化设计在不同的 LCZ 内有所不同。在城市扩展区增加 20% 的行道树和灌木是 LCZ 6 的最佳设计。对于 LCZ 4，在城市扩展区增加 20% 的城市公园树木和 5% 的整体灌木是最佳设计。