Ripening of bananas are not simultaneously. 2 But about five days later. The ripe banana is a fruit. If you do not have its. All bananas will be rotten and damage completely. The team is designed of this project. To study the solve to slow down the ripening of banana and for to be useful in keeping the store and at home. So we are found the solve to leading supplier in the market. And to extended periods of storage for long kept .we are study the way to reduces the damage of the product. We are have the experimental to compare how slow down maturity of bananas. By the design we use potassium permanganate, powdered ground roasted white rice, ground charcoal, chalk powdered, white ashes. These are substance which have the most effective and ability to slow down the ripening of the bananas.