is there’s anyway to create a zoom blur effect on the view on away3D 4?

There’s no such feature built into Away3D, and you might have problems implementing it, at least if the view needs to animate while you execute your blur.

Post-effect filters like these can usually be implemented using the filters system in Away3D, but the thing with blur is that it’s generally quite difficult to implement in shaders unless you have loops, and there are no loops in AGAL.

Another way though would be to read back the rendered view into a BitmapData and do whatever you want with that, but the performance will not be good enough for real-time processing. This might still be ok if you just want to blur a snapshot of the view.