My questions is can you play Halo CE Anniversary online with 4 players splitscreen
because i read on others sites and a few people says it can and some people says it can’t

I’m pretty sure you can do it in Multi-player as it is Reach’s multiplayer and you can do 4 player in that.

Campaign is only 2 player co-op and MP is just like Halo:Reach so 4 player split screen is possible.