The online translation quality of user-generated content(UGC) will affect the reading experience of its readers.Based on the PDCA cycle of P(plan),D(do),C(check),A(action) and the online translation of a UGC sample text,this paper discusses the translation quality management of UGC by application of pre-translation quality assessment,term management,pre-editing and post-editing in the process of online translation,which effectively improves the translation quality.This paper also suggests a flow chart of translation quality management of user-generated content.