细点线是人手指头上的一种特殊的皮肤组织结构。它与乳突纹线有较大的差别。由于其结构特殊且具有较强的稳定性,故它是一种价值很高的手印特征,可作为检验鉴定的依据之一。本文从其表现形态、结构特征和出现率着手,对细点线进行了较为深入的研究。 Thin line is a special human skin tissue structure of the skin. It has a greater difference with the mastoid ridge line. Because of its special structure and strong stability, so it is a very valuable fingerprint features, can be used as a basis for testing identification. In this paper, we begin with the manifestation, the structure and the appearance of the appearance, and make a more in-depth study on the thin line.