The Proto- Tethys Ocean is an important aspect for understanding Tethyan geodynamics. However, the origin of this ocean and the affinity of multiple continental/micro- continental blocks within it are still controversial, hindering the research into its formation and evolutionary history. During the Ediacaran, a suite of glacial sedimentary strata developed on many continental/micro- continental blocks in the Proto- Tethys domain. This study presents a comprehensive analysis of Ediacaran tillites from the southern margin of the North China Craton, the Olongbuluke Terrane, and the Qilian Mountains. Integrating these findings with previous glacial literatures of the Yangtze and Tarim Cratons, as well as regional ophiolite studies, we propose that the North China, Yangtze, and Tarim Cratons, along with the intervening continental/micro- continental blocks, may have been connected and deposited the initial cover of the ancient Chinese Platform during the Ediacaran. Our findings suggest that the Proto- Tethys Ocean was not a direct successor of the Proterozoic Ocean but rather a small ocean basin- microcontinent system that developed after the breakup of the ancient Chinese Platform in the early Paleozoic.