The invention discloses a rapid hemostatic hydrogel. The rapid hemostatic hydrogel comprises acrylamide, inorganic nanoparticles, tannic acid, a crosslinking agent, an initiator and an accelerant, wherein the addition amount of the inorganic nanoparticles is 0.2-10% of the weight of the acrylamide; the addition amount of the tannic acid is 1-20% of the weight of the acrylamide; the addition amountof the crosslinking agent is 0.25-2% of the weight of the acrylamide; the addition amount of the initiator is 0.5-3% of the weight of the acrylamide; 20-40[mu]L of the accelerant is added into each 100g of the acrylamide. The rapid hemostatic hydrogel has the advantages as follows: 1, the rapid hemostatic hydrogel with wet tissue adhesion, prepared by a preparation method provided by the invention, can be firmly adhered to a body tissue without relying on an additional adhesive, an additional bandage and the like during using, can maintain good adhesion strength during repeated use, and is very easy to strip; 2, the hemostatic hydrogel material has relatively high mechanical strength, has the elongation at break as high as 2200% and the compressive strength of 10.15MPa plus or minus 0.36MPa, and can meet surgical requirements.