Fuente: WIPO "hemp" The invention relates to the technical field of chemical materials, particularly relates to a pulp preparation method of ultrathin hemp paper and aims at solving the technical problem of providing a pulp preparation method of ultrathin hemp paper. According to the technical scheme, the pulp preparation method of the ultrathin hemp paper comprises three steps of (1) grinding hemp, transferring the fermented hemp into water-powered roller and repeatedly grinding until the hemp fiber is completely dispersed and adopting front, middle and rear three procedures before grinding the hemp; (2) pulping, transferring the ground hemp into a pulping pool, adding clear water, fully stirring, dispersing the hemp fiber gathered into aggregates after being dispersed due to the grinding action, and then controlling water to obtain the hemp fiber; and (3) preparing pulp, mixing the hemp fiber with water-leaving pulp evenly to prepare the pulp, wherein the water-leaving pulp is prepared from a separating agent and water and the separating agent is prepared from the components in parts by weight: 3-5 parts of a pearl grass extract, 1-2 parts of citric acid and 3-5 parts of distilled water.