The invention provides a preparation method of degreased black 
sesame seed, black bean, 
black rice, and walnut health-care convenient health-preserving 
powder capable of blackening hair. The preparation method comprises the following steps of performing frying and 
roasting, performing physical squeezing unoiling on black sesame seeds, walnut kernels and peanut kernels to obtain degreased black 
sesame seed granules, degreased walnut kernel granules and degreased 
peanut kernel granules, and mixing the degreased black 
sesame seed granules, the degreased walnut kernel granules and the degreased 
peanut kernel granules with black wood ear 
powder, fried black beans, fried 
black rice, Chinese jujubes without cores, and 
crystal sugar to obtain a mixture; and 
grinding the mixture, and performing sieving treatment so as to obtain the degreased black sesame seed, black bean, 
black rice, and walnut health-care convenient health-preserving 
powder capable of blackening hair. According to the method,in the preparation process, any chemical additives are not added, the preparation method is simple and practicable to operate, and industrialized production is easy to realize. The health-care powderprepared by the method can be eaten after being brewed with boiling water, and can achieve the effects of promoting 
hair growth, improving 
organism immunity, promoting 
peristalsis of the intestine andthe 
stomach and strengthening the digestive function and also has the 
efficacy of functionally tonifying the 
liver and kidney, benefitting essence and blood, strengthening bone and musculature and the like.