唐代前期,宰相子弟在其父兄当政期间参加礼部省试的现象还偶有记载;至唐后期,宰相子弟在其父兄任相期间则往往回避应举,推究其源,年龄问题、累举不第等都是不容忽视的因素,而避嫌却是其中最关键的原因。自玄宗开元二十五年后,贡院作为一个相对独立的事务机构开始直接面向中书门下负责,此后宰相主要通过擢选主司、详覆举子文卷等手段对礼部省试工作进行干预;中唐尤其是德宗以后,随着宰相擢选主司权力的日渐稳固,宰相在贡院放榜前就已通过主司呈榜等渠道干预取士工作。出于宰相在录取工作中的重要作用,唐代后期当朝宰相之子弟须主动避试,而违例者将会受到谏官弹劾。 In the early Tang Dynasty, the phenomenon that the prime minister’s younger brother took part in the provincial ceremony during the trial of his father and brother was still occasionally recorded. In the late Tang Dynasty, the prime minister often shied away from their fathers and sons during their tenure, And so are all factors that can not be ignored, but the most arousing suspicion is one of the reasons. Twenty-five years after the reign of Emperor Xuanzong, Gongyuan, as a relatively independent affairs agency, was directly responsible for the book under the book. Afterwards, the prime minister intervened in the provincial ceremony by mainly selecting chief divisions, In the middle of the Tang Dynasty, especially after Dezong, as the prime minister’s election became increasingly stable, the Prime Minister intervened in his work of taking the job before the list was released by the Prime Minister. Due to the important role of the prime minister in the admission process, the children of the prime minister in the late Tang Dynasty should take the initiative to evade the trial while the offenders will be impeached.