In the sultry and humid regions of southern China,resilient tree species like the banyan tree often thrive in crevices or expansion joints of stone retaining walls. These trees,referred to as epiphytes or trees attached to stone retaining walls,extend their roots into the soil behind the wall,sometimes resulting in the complete coverage of the wall by the root system. Assessing the impact of these epiphytic trees on the stability of retaining walls and implementing appropriate measures has become a crucial consideration in urban greening construction and municipal maintenance. Through an examination of the growth conditions and types of epiphytic trees,as well as an analysis of their influence on the wall and the surrounding environment,the following conclusions can be drawn:Predominantly,the epiphytic plants on retaining walls are trees with well-developed roots and high vitality. The transpiration process of these epiphytes plays a role in reducing the water content of the soil behind the retaining wall,thereby lessening soil pressure and enhancing the stability of the structure. Trees attached to retaining wall epiphytes symbolize a harmonious coexistence between humans and nature. Beyond their aesthetic appeal,they hold ecological significance by mitigating urban pollution,purifying air,and contributing to overall environmental health. Properly managing and utilizing these epiphytic trees can enhance urban greening efforts. However,it is essential to be mindful of their maintenance. Pruning of branches and leaves should be carried out judiciously,taking into account the specific conditions. Epiphytic trees with underdeveloped roots and thick branches should be promptly removed to prevent potential instability or deformation of the retaining wall. Balancing the preservation of these natural elements with strategic intervention ensures a sustainable and safe urban landscape.