Why did you resurrect a five-year old thread to ask this?

Can I know if its possible to make a page in QStackedWidget child of another page in the same stacked widget.
No, it makes no sense. A page in a QStackedWidget is a child of the QStackWidget and cannot simultaneously be the child of something else.
Also is it good to have a stacked widget on another stacked widget.
Possible, yes. Good, that really depends on exactly what you are expecting the user interaction with this GUI to be.
I will be having 8 basic stackedwidgets on which I plan to add 8 more stacked widgets. Is it a good idea or should I try for QTabWidget or QMdiArea?
Not sure exactly what you mean here but stacked pages on stacked pages sounds horrible from this user's point of view.