Translation is a very complicated human activity in a high-level language and different areas, different scholars have different definitions of translation. But the translation of idioms is one of the most distinctive classifications in translation. This paper aims to make English learners and translators have mastered for the classifications of the animal idioms, the influencing factors of animal idioms translation, the most appropriate and most effective translation methods by introducing the basic knowledge of translation and the development of idioms simply and the translation methods of animal idioms concretely. The significance of this paper lies in, teaching the readers the most appropriate and most effective translation methods, which has some certain practical value.