Research on second language (L2) collaborative writing (CW) has proliferated over the recent decade and will continue to bloom due to the changing landscape of writing and learning in the digital age. This article provides a research agenda on CW in L2 classrooms. We illustrate six research themes for future research inquiry by pointing out the research gap, following a brief review of theoretical frameworks and existing empirical efforts on CW. We then expound on six specific research tasks that we deem to be pressing for this domain to progress, including more attention to multimodal CW, expanded frameworks for analyzing peer interaction and writing products, deployment of underused research techniques and improved research practice, development of CW assessment practice, as well as the inquiry of practitioners’ input on CW. We hope to provide guidance for future research endeavors by identifying avenues of investigations on CW and meanwhile contribute to the trajectory of vibrant research on L2 writing and language learning.

近十年来，关于第二语言 (L2) 协作写作 (CW) 的研究激增，并且由于数字时代写作和学习格局的变化，将继续蓬勃发展。本文提供了 L2 课堂中 CW 的研究议程。在简要回顾 CW 的理论框架和现有实证工作之后，我们通过指出研究差距来说明未来研究调查的六个研究主题。然后，我们阐述了我们认为推动该领域发展的六项具体研究任务，包括更多地关注多模式 CW、用于分析同行交互和编写产品的扩展框架、未充分利用的研究技术的部署和改进的研究实践、CW 的发展评估实践，以及从业者对 CW 的投入调查。