The cross-regional mobility of waste has become an important approach to achieve a higher waste recycling rate in some countries. However, there is a lack of study to examine the associated environmental impacts. To address this gap, a life cycle thinking based environmental assessment model with 12 indicators was developed. The foreground data obtained in this study came from multiple sources and the background data was mainly obtained from GaBi Professional. Three main scenario settings including 51 sub-scenarios were developed. The results show that at current situation in Australia, the environmental impact in terms of GWP 100 years shows -6.73E+11 kg CO 2 -Equiv., AP -2.92E+09 kg SO${}_2$ -Equiv., EP -5.18E+07 kg Phosphate-Equiv., and Land occupation 3.55E+06 m 3 . The results showed that if the recycling rate passed 50%, the environmental impacts deduction value of recycling will surpass the environmental impacts. Amongst the waste materials, steel is a critical contributor to the environmental impacts for most environmental indicators. This study revealed that if the cross-regional mobility of C&D waste increases the overall recycling rate of the waste generated in all regions involved, it can reduce the environmental impacts of the waste, and vice versa. This study gains the knowledge of environmental impacts of the cross-regional mobility of C&D waste, which is largely overlooked in previous studies. Meanwhile, it provides the index and fundamental data for the development of LCA methodology in assessing the performance of C&D waste management. Future studies should seek for more local background data and up-to-date environmental impacts data.

垃圾的跨区域流动已成为一些国家实现更高垃圾回收率的重要途径。然而，缺乏研究来检查相关的环境影响。为了弥补这一差距，开发了一个基于生命周期思维的环境评估模型，包含 12 个指标。本研究获得的前景数据来自多个来源，背景数据主要来自GaBi Professional。开发了三个主要场景设置，包括 51 个子场景。结果表明，在澳大利亚目前的情况下，以 GWP 100 年计的环境影响为 -6.73E+11 kg CO 2 -Equiv., AP -2.92E+09 kg SO${}_2$-当量，EP -5.18E+07 kg 磷酸盐当量，和土地占用 3.55E+06 m 3 。结果表明，如果回收率超过50%，回收的环境影响扣除值将超过环境影响。在废物材料中，钢铁是对大多数环境指标的环境影响的重要贡献者。本研究表明，如果C&D废物的跨区域流动提高了所有涉及区域产生的废物的整体回收率，则可以减少废物对环境的影响，反之亦然。本研究获得了对建筑垃圾跨区域流动的环境影响的认识，而这在以前的研究中很大程度上被忽视了。同时，它为 LCA 方法的发展提供了指标和基础数据，用于评估 C&D 废物管理的绩效。未来的研究应该寻求更多的本地背景数据和最新的环境影响数据。