Eunuchs played a crucial role in the late Tang dynasty. However, most studies on the relationship between eunuchs and literati have neglected the performance of violence. To highlight the effect of violence, this article focuses on the event of eunuchs assaulting Cui Fa in 825 C.E. From the viewpoint of microstudy, this article explores why and how eunuchs attacked literati physically as well as how contemporary interpreted this distress. First, the author investigates the process, time, space, and participants of the 825 C.E. event. Second, the author analyzes the narrative of historical sources, the images of eunuchs, the idea of social order in the Tang society, and the solutions of the Tang court to the event. The result of this article indicates that eunuchs used violence as a method of communication and an expression of their demands. Furthermore, when eunuchs became attackers, the duality of eunuchs’ identity supplied the emperor and literati with resources to argue the essence of the attack. That is, violence not only caused physical damage and psychological impact but also challenged the order of ethics and the solidity of the empire. Therefore, the court and officials were eager to reconstruct the disorder through political and legal schemes. By contextualizing the representative case, this article contributes to our understanding of violence in the late Tang dynasty.