The invention provides a peptide-containing low molecular plant protein milk and a production method of the peptide-containing low molecular plant protein milk, belongs to food technical field, and overcome the defects of existing products, such as long digestion absorption time and low digestion rate. The production method comprises the steps of cleaning and selecting raw material soybean, drying, skinning, deactivating enzyme, coarse grinding, fine grinding, enzymatic hydrolyzing, separating pulp and residue, instantly sterilizing and deactivating enzyme under ultrahigh temperature, homogenizing, and drying to obtain powdered product with relative molecular weight not greater than 5,000. By adding enzymatic hydrolysis link in existing production process of soybean milk and instant soybean protein milk powder, the milk contains above 10% of low molecular peptide components, to relieve protein enzymolysis burden in human body after taking soybean milk or protein powder, shorten digestion time, improve digestion rate, and facilitate peptide (low molecular protein) supplementation for weak and sick population, the elderly and children through taking soybean milk or protein powder.