1, children with ADHD have few interests, even if children through the favorite game machine, children’s television programs, etc., can not make them concentrate; and naughty children are very different, they are interested in the activities not only can pay full attention, but also hate other people’s interference and influence. 2. Children with ADHD act impulsively and in a disorganized manner, without any end in sight. For example, when doing homework, they can’t pay attention to it, and they do it carelessly and haphazardly. They do not finish their work, often stopping halfway or changing frequently. The behavior of naughty children has a certain purpose, and is planned and arranged. 3. Children with ADHD have poor self-control and are busy and noisy no matter what the occasion, for example, they cannot sit still in the classroom, often squirm in their seats or stand up, and in serious cases leave their seats and walk around or leave the classroom without permission. They talk a lot, make a lot of noise, interrupt, cause trouble, and interfere with classroom discipline to get others’ attention. They are not so naughty, but they can be peaceful in unfamiliar environment and serious occasions, and they dare not fool around, and they have better self-control. Therefore, do not “see the wind is rain”, when you see children hyperactive, you think they have ADHD, put the “hat” on the naughty children, bring them unnecessary psychological pressure. If you can’t tell the difference yourself, go to a specialist hospital and let your doctor identify it.