Research studies on the factors for the digestion of maize by -amylase. That can make a relation between the amount of reducing sugar and maize residue that the condition of digestion. The effect of the amount of -amylase ,temperature in the digestion and the time it takes to digestion were studied. These are an important factor affecting the digestive tract. The results of the study techniques are used to analyze the three techniques are analyzed by using Spectrophotometric Method to determine the amount of reducing sugar by DNS Method. Weight Loss Method to check the disappearance of maize after digestion and analysis by X-ray Diffraction Analysis (XRD) showed a maximum of crystallinity in partially digestion.