本文分析吴语海盐话古全浊上声字的声母。海盐话古全浊上声字声母有清不送气、清送气、内爆音三向对立,擦音也有真浊擦音和清擦音两项对立。全文分七部分:1.声母、声调系统介绍;2.内爆破音的声学特点;3.真浊擦音[v-、z-]的声学性质;4.内爆破音、真浊擦音跟声调的关系;5.辅音声母清不送气、清送气、内爆音三向对立;6.内爆音、真浊擦音的来源和演变。 This paper analyzes the initials of Wuyu Haiyan dialect ancient voiced sound. Haiyan dialect ancient voiced consonants have clear astringent, clear air, implosion three-way opposition, fricative also have true voiced and rubbing sound two antithesis. The full text is divided into seven parts: 1. initials, tone system introduction; 2. the acoustic characteristics of the inner explosive; 3. true acoustic fricative [v-, z-] acoustic properties; Tone relationship; 5 consonant consonant clear air, clear air, implosion three-dimensional opposition; 6 implosion, the source and evolution of true voiced audio.