The invention aims to provide fiber suitable for clinical application, in particular to the application of hemostasis, scalding, chronic wound treatment and others. The invention is a hemostatic material, wherein the hemostatic material includes fiber, and the material is possessed of biodegradability; the hemostatic material is characterized in that the fiber includes a polymer expressed by the following structural formula: FORMULA, wherein R is at least one of groups consisting of -NH2, -CH2CH20H, -OCH2CH2CH2OH, -OH, -ONa, -OK, -OCa; m, n and p respectively represent the quantity percent of corresponding repeat unit in the polymer molecule and can meet the following relationship formula: m+n+p=1, p/(m+n+p)=0.05-0.30; the degree of substitution D is defined as m/(m+n+p), the total degree of substitution of fiber is defined as Ds, and the degree of substitution of polymer at the center of the fiber cross section is defined as D0; when the degree of substitution of the edge of the fiber cross section is defined as D, the following relationship formula can be satisfied: Ds=0.09-0.8, Do/D=0-0.7.