Ctrl+alt+space toggle fullscreen without zoom in?

hello everyone,everytime i toggle fullscreen,it will zoom in a little,is there any to make it stay in the same loction?thanks!

That is not a zoom. That is same view, with same perspective, occupying a larger screen space.
If you go to Camera View, you will see that maximizing viewport does not frame the scene differently.
What you are asking for is an extension of the view that would imply the support of a perspective no more centered on center on the screen.
Navigation in such viewport would be problematic.
That would be a totally different logic to how viewport is currently working.

thank you zeauro.hope blender can make this feature in future update.