Diastolic milk is a kind of milk that uses lactase enzyme to hydrolyze lactose in milk, pre-digests milk, refines the nutrition, improves the flavor and taste of milk, and enhances the nutritive value and utilization of milk, and as a high hydrolysis rate of low-lactose milk, it can satisfy the needs of different degrees of lactose intolerance and lactase deficiency of the health of the milk drinkers.