how can i reduce the transaction size of createtable when using azure function binding?

There are many CreateTable transactions.

The reason why have so many CreateTable transactions is because the underlying code is trying to create.

Is there anyway to reduce CreateTable transaction? May I need to use custom binding?

I am not sure what language you are using now, if you try to use C# IBinder, maybe you will still run the create step. You can create your own logic in the body of function, I think this can perfectly avoid this problem. Just try to get it instead of create it.