The invention discloses a degradable starch-based hemostatic material, a preparation method therefor and applications. The preparation method comprises steps: firstly, raw materials processing is carried out, namely, starch is cleaned in water; secondly, crosslinking is carried out, namely, ultrapure water is added in starch, the temperature is risen to 30-70 DEG C, sodium chloride and a sodium trimetaphosphate solution are added, heat insulation is carried out for 10-60min, a reaction with stirring is carried out for 2-48h, the solution pH is adjusted, and crosslinking starch is obtained; thirdly, enzyme pore forming is carried out, namely, the crosslinking starch, calcium chloride and alpha-amylase are mixed and reacted for 2-24 h, the reaction temperature is 50-75 DEG C, and the degradable starch-based hemostatic material is obtained after cleaning. The degradable starch-based hemostatic material can be used for preparing a hemostatic material of body surfaces and tissues in bodies, and preparing a bleeding control material for excessive bleeding of parenchymal viscera in the bodies or movable parts or parts difficult for haemostasis. The degradable starch-based hemostatic material is advantaged by good biological compatibility, degradation in bodies, low cost, simple preparation, convenient production, no toxins and environmental protection.