Belonging to the technical field of food, the invention discloses donkey-hide gelatin raw powder and its preparation method. The powder is a convenient product prepared by the following steps of: taking donkey-hide gelatin extract as the raw material and subjecting it to enzymolysis treatment by a biological composite enzyme, then adding rock sugar, yellow rice wine and other auxiliary raw materials, conducting microencapsulation treatment with maltodextrin and beta-cyclodextrin as wall materials, and carrying out vacuum drying, crushing as well as packaging. In the product, the molecular weight of 80% of low-molecular weight peptides is less than 2000 Dalton. Various amino acids are composed reasonably, thus being easy for the human body to adsorb. And the employed embedding technology and vacuum drying technology maintain the active substances and nutrients in donkey-hide gelatin to the utmost. The vacuum drying technology adopted in the method of the invention lowers the drying temperature, and also can prevent the loss of active substances and nutrients in the drying process. Thus, the product of the invention has improved quality and stability, as well as good dissolvability and fluidity.