In recent years, the rapid development of open courses has a profound impact on the sharing of domestic high-quality education resources. However, the development of open courses resources has encountered mutual prob-lems in respect of sustainability and reproducibility, such as"high dropout rate" and"low sustained rate","low up-date rate" and "narrow range of options". The core of the problems lie in the fact that the one way development makes open courses unable to grow healthily. Under this background, the urgent issue is how to maintain the sustain-ability of open courses. In order to make a breakthrough, the author made an empirical research into the mode of resources development"From Sharing to Symbiosis" on the basis of"Visual Culture and Media Literacy" course which has been constructed and explored for over a decade in Nanjing Normal University. By theoretically combing and extracting the data, this study proposes a new path to open courses resources development"Iterative Symbiosis" and expects to achieve a sustain-able development of open courses resources. The "From Sharing to Symbiosis" model has innovatively subverted the traditional one-way resources develop-ment model and has incorporated the students' works into the creation of a new round of teaching resources develop-ment. Students who select the course have double identities in that they both share the original resources and create re-newable resources. Simultaneously, with the continued expansion of the developers, learning resources keep expanding and optimizing. This resources development model has achieved sustainable development of courses resources. Based on the analysis of over a decade’ s practice of"Visual Culture and Media Literacy" course, the author proposes a new path to resources development:"Iterative Symbiosis", expecting to incorporate the concept of iteration into the mode of "Sharing to Symbiosis" to make sustainable development, thus solving the current bottleneck problems con-fronting open courses. It is a student-centered reversed mode of resources exploitation while the teachers only give them positive guidance. Simultaneously, it is a triple dynamic iteration consisting of learning resources, learning communi-ties and resources development paths. "Iteration Symbiosis" resources development path can change the fixed path of resources development model, expand the teamwork of resources development, consistently create more high-quality teaching resources,and eventually achieve the sustainable development of open courses resources. This new resources de-velopment path has a broader application in the construction of open courses and will be used as a reference for the con-struction work of open courses resources.%近些年我国开放课程的迅速发展对促进国内优质教育资源共享产生深远影响，但在开放课程资源开发的持久性和再生性发展中遇到一些共性问题。南京师范大学“视觉文化与媒介素养”课程在长期的课程建设实践中探索形成的“从共享到共生”的资源开发模式可以为这些共性问题的解决提供有益的借鉴，如果在“从共享到共生”的基础上再进一步提升为可持续的“迭代共生”资源开发模式，将不失为突破我国开放课程资源建设瓶劲问题之有效创新路径。
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