With the development of English translation of Du Fu’s poetry, studies on English translation of Du Fu’s poems have also continued to develop. However, these studies are mostly confined to the English translation of one or several specific poems. There are only a few papers or theses that comprehensively analyze and contrast aspects like translation thoughts, principles, strategies, etc., of translators in the process of their translation. Translator’s preface fall into the category of “paratext”; they usually contain a translator’s introduction to the original work, the author as well as his or her intent of translating, etc. Translator’s preface are carriers of the translator’s translation thoughts and contain numerous theoretical resources of translation principles, strategies, techniques, etc., which, therefore, are of great research value. This thesis selects 36 translated works of Du Fu’s poems and studies their prefaces, with particular reference to translation. On the one hand, the study analyses how a preface reflects a translator’s translation thoughts, strategies, techniques; and on the other hand, through a case study, it explores in what way these elements guide a translator’s translation practice. Thereby, it is expected to generalize some translation rules in order to provide guidance for research on the translation of Du Fu’s poems.