As a social linguistic variable, social network has an important impact on L2 learning. It can not only provide learners with access to resources and information, but also trigger changes in learners’ emotional attitudes and behaviors. Moreover, social networks interact with learners’ individual differences, such as linguistic identity. Therefore, this study constructs a structural equation model to investigate the impacts of social network and language identity on L2 Chinese oral production. The conclusions are as follows: (1) The size of social network has a significant direct effect on accuracy and fluency. The strength of social network has a significant direct effect on accuracy. The density of social network has no direct effect on L2 Chinese oral production. (2) Language identity has a direct impact on L2 Chinese oral production, and its direct effect on complexity is the most significant. (3) There is interaction between social network and language identity. Network strength has a significant direct effect on language identity, and the mediating role of language identity in the interaction with network strength plays a positive role in complexity. The research conclusions can provide rich data support for revealing the impacts of social linguistic variables and learners' individual differences on L2 oral production, as well as for L2 oral instruction.

社会网络作为一种社会语言变量对二语学习具有重要影响，不仅可为学习者提 供资源和信息获取渠道，还可触发其情感态度和行为的改变。社会网络也会跟学习者个体 差异因素发生交互关系，如语言认同。本研究通过结构方程模型考察社会网络和语言认同 对汉语二语口语产出复杂度、准确度和流利度的影响。结论如下：（1）社会网络规模对准确 度和流利度具有显著直接作用，社会网络强度对准确度具有显著直接作用，社会网络密度对 口语产出未产生直接作用。（2）语言认同对汉语二语口语产出具有直接影响，对复杂度的 直接作用最为显著。（3）社会网络和语言认同存在交互关系，网络强度对语言认同具有显 著的直接作用，而且语言认同在跟网络强度交互的过程中充当中介角色对复杂度发挥积极 影响。研究结论可为揭示社会变量和学习者个体差异因素对二语口语产出的影响提供数据 支持，也可为二语口语教学提供策略上的参考。