The invention discloses a diaphragma juglandis instant product and a preparation method thereof. Diaphragma juglandis is taken as a raw material, and the method comprises the steps of cleaning the diaphragma juglandis, drying at 50-60 DEG C, grinding to 4-6 mm, carrying out enzymolysis, carrying out segmented decocting for a plurality of times, filtering, adding a thickening agent and drying, wherein enzymolysis is carried out by compounding cellulase and pectinase, decocting is carried out for three times at the temperature of 70-100 DEG C, and the drying conditions are as follows: the inlet temperature is 160-180 DEG C, the outlet temperature is 70-80 DEG C, and spray drying is carried out on 2.5-5 L of material per hour. The diaphragma juglandis instant product has the health care functions of tonifying kidney, arresting seminal emission, calming and helping sleep and the like, is low in cost of production raw materials, less in input of the preparation process, good in instant property, and clear and transparent in soup color; the diaphragma juglandis instant product has the original faint scent taste of diaphragma juglandis, and is excellent in quality, clean, sanitary, convenient to carry, stable in yield and wide in use. The product has great potential, and utilizes the rich diaphragma juglandis resource, so that the industry chain is prolonged, and the comprehensive benefit of the industry is improved.