本文简要介绍了二语习得中的第一语言损耗及其生成原因,以及相关的研究。并为此做了相关的问卷调查,从而证实中国的外语学习者中也存在第一语言损耗现象,其英语的掌握水平与此紧密相连。在学习第二语言时,人们往往觉得母语或第一语言的影响很大,经常将母语的语法,句式用在外语运用中,这种在二语习得中称为迁移(L1 transfer)。这种现象在二语习得过程中,尤其是初级阶段,十分常见。但是某些人当外语学到 This article briefly describes the first language loss in second language acquisition and its causes, as well as related research. And to do this related questionnaire survey, thus confirming the first language loss phenomenon also exists in foreign language learners in China, the English mastery level is closely linked with this. When learning a second language, people often think that they have a great influence on their mother tongue or first language. They often use the native grammar and sentence patterns in foreign language use. This is called L1 transfer in second language acquisition. This phenomenon is very common in second language acquisition, especially in the early stage. But some people learn it in a foreign language