Abstract: Cloud rendering, as an advanced technology to enhance the user experience of virtual simulation experiment in resource sharing, has been gradually promoted, but its advantages and problems in the teaching process need to be further studied. First of all, relying on the resources of the national virtual simulation experiment teaching course sharing service platform, the used sharing technologies of virtual simulation experiment teaching courses were analyzed, and the technical advantages of virtual simulation experiments based on cloud rendering were analyzed too. Secondly, taking the cloud-rendering-based virtual simulation teaching experiment of fully mechanized top coal caving as an example, the content of the experiment and its application status in teaching were introduced. Finally, the teaching practice activities of the cloud-rendering-based virtual simulation experiment teaching system are summarized and the problems encountered and the corresponding treatment measures are analyzed. The analysis is expected to promote a better development of virtual simulation experiment teaching in terms of resource sharing.