Kill All Entities Expect Players Using Command Block
Want to kill all mobs expect Players using command Block ? it is so easy all you need to do is Placing a command block and Paste the code:
/kill @e[type=!Player]
More Details in the picture . its just a small expamle about it , In the picture 2 when you click on the button you can see every mod dies and in Picture 3 you see the command and the chat what mobs have died.
Hope this Helped you .