The invention discloses an absorbable rapid bleeding stopping material and a preparation method thereof. The material comprises medicine carrying calcium alginate porous microspheres, oyster shell powder and sodium carboxymethylcellulose. The medicine carrying calcium alginate porous microspheres and the oyster shell powder have the following two functions: firstly, the medicine carrying calcium alginate porous microspheres and the oyster shell powder serve as a molecular sieve, and can rapidly absorb the water in blood when making contact with the blood, so that visible components in the blood can be rapidly concentrated; secondly, the medicine carrying calcium alginate porous microspheres and the oyster shell powder can release a large number of calcium ions for acting on blood coagulation factors which are concentrated on the material surface, blood coagulation is accelerated, bleeding stopping time is shortened, and the amount of bleeding is reduced. The adopted materials are natural macromolecule polysaccharide and inorganic salt, and the characteristics of good biocompatibility, biodegradability, safety, non-toxicity, absorbability, bleeding stopping ability and the like are achieved. The preparation process is simple, the medicine can be released continuously and steadily within a certain period of time, and the absorbable rapid bleeding stopping material can bring great benefits to the medical field and the society.