In a general sense, most people might think that Buddhism is opposed to war on the premise of advocating compassion and non-violence. There are many narratives and theories supporting this view in Buddhist texts. However, we can also find in several Buddhist texts that Buddhism is not entirely opposed to war, precisely because of compassion and non-violence. This is not paradoxical, but there are further reasons. This article analyzes the root problem of “war” based on Buddhist point of view, and further reflects on the Buddhist ethical perspective of non-violence and peace. This article also tries to take moral particularism as an intermediary theory to elaborate Buddhist Ethics does not advocate that a single and absolute principle can be applied to different moral situations and emphasizes practical wisdom, and finally takes “Buddhist Fusion Ethics” to understand Buddhist ethics.