In low and middle-income nations, diarrhea is the second most common cause of death among children under the age of five. It has been found that green bananas (Musa paradisiaca) can shorten a child's diarrheal illness's duration. The focus of the research is to determine how well cooked rice-mung bean with green banana (GB-RM) treats watery diarrhea (WD) in children between the age of 6 and 36 months. Children in the control group in this open-labeled, randomized, controlled trial received standard care, whereas children in the intervention group got cooked GB-RM in combination with standard care while being monitored in the hospital for 72 hrs., followed by continued administration at home until diarrhea stopped. The primary objective was the percentage of children who had improved after the intervention (passing firm stools on a regular basis) and the secondary objective was the frequency of problems including dehydration and chronic diarrhea. This study is anticipated to elucidate on how green bananas can be incorporated into WD dietary management. Cooked green bananas can be added to a child's diet to help them recover more quickly if they have acute watery diarrhea without dehydration.