My house is 10 years old my basement floor drain by the hot water heater has backed up. The frist time it backed up it had food in it and other stuff the 2nd time it has some food now no food just water. The smell is bad. I have put drain cleasner down it and snaked it every time. Can someone tell me what to do?

You have a partial blockage in the kitchen sewer line. The blockage causes waste water from the kitchen to back up into the floor drain. The partial blockage then allows the water to slowly drain away leaving the food particles in the floor drain and trap. Snake the kitchen drain. If you can get the snake to go through the floor drain trap you can snake from there.