The invention relates to chickpea proteinic nutrition powder and a preparation method thereof. The nutrition powder adopts chickpea, chickpea dregs and chickpea skin as raw materials, the chickpea is ground into chickpea powder, then the recycled chickpea dregs and chickpea skin are smashed, aqueous alkali is mixed with the recycled chickpea dregs and the chickpea skin to be extracted and centrifugalized, upper clean liquid is mixed, hydrochloric acid solution is dripped into the mixed clean liquid to be ccentrifugalized so as to obtain the chickpea protein solution, and then the chickpea protein solution is mixed and blended with the chickpick powder to be sequentially fine ground, refined, dried in atomizing way, screened, sterilized by ultraviolet and packed to obtain the chickpea proteinic nutrition powder. The nutrition powder is rich in phytoprotein and soluble dietary fibers, which are easy to digest and absorb by the human body, 18 kinds of amino acid, crude fat, polyoses, linolenic acid, linoleic acid, minerals such as calcium, phosphorous, zinc, iron, magnesium, selenium and the like, and vitamins C, B1 and B2, so that not only can the original nutritive value of the chickpea be maintained, but also the content of protein in the chickpea is improved by two to three times, and simultaneously purposes on changing waste into valuable and adequately utilizing the resource also can be realized.