How to install wordpress Demo package on Network (multisite)?

What “demo package”?

yeah yootheme wordpress themes come with demo packages as well. you just have to upload the package and run installation.

i just want to know how to install this demo package on a multisite network?

I’m sorry but as you appear to be using a commercial theme, you need to seek support from the theme’s developer/vendor. We do not support commercial products here.
Try https://www.yootheme.com/support