本文运用四种汉语被动句型对9—12岁汉、藏、东乡族儿童进行测验,比较各比族儿童汉语被动句转换理解水平的特点。研究结果表明各民族之间存在着种种差异,造成这些差异的原因主要在于被试受教育的程度,对第二语言的态度等因素。不同母语的特点对于汉语句型转换理解水平并没有十分明显的影响,民族之间的差异是一般的语言能力与语言知识的差异 This paper uses four Chinese passive sentence patterns to test the Chinese children aged 9-12 years in Han, Tibetan and Dongxiang ethnic groups, and compares their understanding of the passive Chinese sentence conversion. The results show that there are all kinds of differences between the various ethnic groups, these differences are mainly due to the level of education subjects, attitude toward second language and other factors. The characteristics of different mother tongues have no obvious effect on the understanding of the Chinese sentence-switching comprehension, and the differences among the nations are the differences between general linguistic competence and linguistic knowledge