Abstract: An adjustable dog collar with a breadth that is placed around necks of dogs and has a ladder lock buckle thereof positioned right under their jaws. The collar further has a first and second straps, each has an adjustable diameter to ensure the dog collar would not slip down from the necks of dogs and would not be tightened unlimitedly. Thereby the dog collar prevents suffocation and tracheary injuries of dogs and enables easier control of dogs with less strength needed from the dog owners.