Base on analysis of the translation of Li Shangyin’s Untitled by Xu Yuanchong,this paper discusses the application of translation principle“multi-dimensional adaptations and adaptive selections”in translating classical Chinese poetry.It is proved that“three dimensional transformations”are effective translation methods in C-E translation of classical Chinese poetry. Base on analysis of the translation of Li Shangyin’s Untitled by Xu Yuanchong, this paper discusses the application of translation principle “multi-dimensional adaptations and adaptive selections ” in translating classical Chinese poetry. It is proved that "three dimensional transformations are effective translation methods in CE translation of classical Chinese poetry.