Writing reflects not only learners' ability to use language, but also their character as a person. The study of writing test has important implications for both Second Language Acquisition and teaching process. This paper reviews the research findings on English writing test in China over the past decade, including assessment, validity and backwash effect. The results demonstrate that researches on assessment of writing test includes scoring dimensions, scoring approaches, development of scoring scales and so on. Moreover, in terms of the validity, cognitive validity, content validity, and context validity have all been researched. However, compared with the validity of different task types of writing test, there are relatively few studies on these three dimensions. However, structure validity has been rarely mentioned in the validity studies of the last decade. As for backwash effect, both positive and negative effect have been studied, but there are still no practical measures to effectively attenuate or circumvent negative backwash effect. In a word, the researches related to writing test in China have become more and more systematic in the last decade.