本文分析160年上海方言声母[dz]/[z]变异,指出是一种文白异读现象;根据历史文献及现代北部吴语相关读音,证明北部吴语从邪澄崇船禅等母原先的读音是浊擦音,读[dz]是杭州半官话的文读渗透层。随着杭州话权威地位式微,文读层在吴语里呈消退趋势;各地消退的程度不一,所以对应不整齐。 This article analyzes the variation of the initial dialect [dz] / [z] of Shanghai dialect in 160 years, pointing out that it is a kind of literary and colloquial variation. According to the historical documents and the related pronunciation of modern northern Wu dialect, Voice fricative cloud, read [dz] is Hangzhou semi-Mandarin reading penetration layer. With the slight decline of the authoritative status of Hangzhou dialect, the reading level has receded in Wu dialects;