Abstract: At present，the sudden pandemic around the world is forcing the reform of school teaching mode，so it is urgent to
develop the network teaching platform of various disciplines. Under the concept of lifelong education，this paper first expounds the necessity of developing the network teaching platform of teaching Chinese as a Second Language （TCSL），and then discusses the overall design of that from the following aspects including the dimensions，structure，basis，principles and suggestions of the overall design. It tries to outline the "ought-to-be"orientation of overall design，so that it can provide a certain reference for the future development and design of the network teaching platform of TCSL.

Key words: network teaching platform of TCSL, overall design, Chinese learners