The purpose of this study is to investigate the effect on children with developmental disability and dysphagia by implementing applied behavioral analysis, and to provide basic data for applied behavioral analysis as dysphagia intervention for children with developmental disability. Data were collected through meal records from the caregivers, and it lasted for 5 sessions from April 2017. One session of 30 minutes consisted applied behavioral analysis, one method of behavioral modification. The amount of food, meal duration, frequency of meals, and the food consumed during the day were checked. The amount of food consumed increased to upper 700~800g, and with the increase of the amount, the frequency of meals with small amounts have decreased and the meal duration time relatively decreased. In addition, participants who consumed food in powdered formula more than 80% of the time consumed powdered formula for 50% and the remaining 50% in baby food after one week of treatment, and after two weeks of treatment, the participants were able to consume baby food 100% of the time. Applied behavioral analysis intervention, a form of behavioral modification therapy, seems to be an effective method of treatment to increase the amount of food consumed and the decrease in the frequency of meals for children with developmental disability, specifically food refusal problematic behaviors.