Ender 3 v2 neo, it start printing then sometimes it stop

Well, i got a ender 3 v2 neo, i start printing and evering is ok, but later it fail

Sorry to hear your having printing issues.

Does the print fail in the same place every time and are there any error messages on the printer itself? What sort of failure is it?

I would recommend formatting your SD card if you use one and re-slice your files to be sure they are clean.