The invention relates to a preparation method of Cangzhou golden silk jujube powder. The preparation method comprises the steps of: selecting high-quality golden silk jujubes, cleaning the golden silk jujubes with clean water, and drying surfaces of the golden silk jujubes; slicing the golden silk jujubes, removing kernels of the golden silk jujubes, placing the golden silk jujubes into a container, adding pure water with the mass of 5-7 times of the mass of jujube flesh, and preparing pulp with a beating machine; adding pectinase with the mass of 0.14 percent of the mass of the jujube flesh, heating for 40 min in a water bath kettle with the water temperature of 40 DEG C; performing enzymatic extraction through ultrasonic waves after water bathing enzymolysis; adding drying additives and auxiliary drying additives into jujube pulp after enzymolysis, wherein the mass ratio of the main drying additive maltodextrin and the jujube pulp is 6:4, the auxiliary drying additives consists of mixture of soy isolate protein, beta-cyclodextrin, soluble starch and lecithin, and the amounts of the soy isolate protein, beta-cyclodextrin, soluble starch and lecithin are respectively 2.5 percent, 15 percent, 15 percent and 3 percent of the mass of the jujube flesh; and then making the mixture homogeneous with a homomixer. The homogenized matter is placed in a flat plate with the spreading thickness of 2-6mm, dried by microwaves of the power of 500-700W until the water content of a sample is 0.2, then dried in a blast drying box with the temperature of 100-120 DEG C, and finally pulverized with a mortar or crushed by a crushing machine into powder.