20世纪发现的汉乐浪郡官印、封泥,目前已具备进行分期断代的条件。本文围绕这一目标,通过对这批资料的梳理,引申出笔者对乐浪郡行政状况及其延续时代、乐浪印章使用群体的民族属性、中原印章文化东传诸问题的思考。 Han Lelang County official seal found in the 20th century, sealing mud, now has the conditions for the phased dating. This paper centers on this goal, through the combing of these materials, I extend my thinking on the administrative status of Lelang County and the continuity of its era, the nationality of the users of Lelang seal and the issue of the seal culture in the Central Plains.