唐朝后期社会的发展,若与前期相比,其分化的倾向是至为明显的。在所有导致转变的因素中,最重要的是中央王权对全国(特别是北方边地)控制能力的下降,它是引发社会转轨的关键。本文着重讨论唐后期中央控制力减弱对地方产生的影响,以及如何导致地方势力与民族势力结合形成新权力格局的现象,并尽可能地分析其原因。 In the later period of Tang Dynasty, the development of society, if compared with the previous period, the tendency of differentiation is obvious. Of all the factors that led to the change, the most important one is the declining control power of the Central Kingship over the country, especially the northern borderlands. It is the key to triggering social transition. This article focuses on the impact of the weakened central control on localities in the late Tang Dynasty and how to combine the local forces with the national forces to form a new power pattern and analyze its causes as far as possible.