中唐诗人李贺为避家讳而“不肯举进士”，本文认为家讳问题的提出不是孤立的，而是有着深刻的历史性和现实性，家讳阻遏李贺进士及第乃是儒家德治思想指导科举制度的必然产物：首先，儒家之德治思想赋予道德以本体意义，李贺接纳了这一人性规范；其次，德治思想的现实性在于它以庆赏刑罚等手段强制个体恪守孝道，并在此基础上以尽臣道。李贺在这一点不敢冒进。以上两点注定了李贺在进士及第问题上只有退守 Li He, a poet in the middle of the Tang Dynasty, refused to give a scholarship to avoid being a taboo subject. This paper argues that the issue of taboo is not isolated, but has profound historical and realistic features. First of all, Confucian moral rule confers morality on the noumenon and Li He accepts this norm. Second, the reality of the thought of governing by virtue is that it compulsory individual Abide by filial piety, and based on this to Chenchen Road. Li He is not aggressive at this point. More than two doomed Li He Jinshi and the first question only retreated