The invention relates to California walnut 
dew containing endopleura and a preparation method thereof. The California walnut 
dew is prepared from the following substances by weight percent: 2-15% of white granulated 
sugar (or newtol), 3-8% of California walnut kernel, 0-2% of 
peanut kernel, 0-4% of almond, 0-5% of corn, 0-5% of 
sunflower seed, 0-4% of filbert, 0-2% of sesame, 0-0.1% of salt, 0.3-0.4% of 
emulsion stabilizer, 0.04-0.06% of essence and the balance of water. The California walnut 
dew has the advantages that a novel product is provided for 
processing of the California walnut; the shelling and filtering procedures are saved; the production efficiency is improved; the 
utilization rate of the materials is maximized; the production cost is reduced; and VB1, 
phosphorus and 
zinc contained in the walnut endopleura have great influences on growth and development of an infant body and intelligence and improvement of human 
immunity. The product disclosed by the invention is purely natural, and free of a 
corrosion remover, has a good effect of brain fitness, benefits for control of 
insulin levels of diabetes, and can effectively reduce the risk of a cardiovascular 
disease after being eaten for a long period of time.