The present invention relates to the technical field of heat sublimation transfer printing, and discloses instant-drying type high-ink-absorption heat sublimation transfer printing digital paper, which sequentially comprises base paper, a water absorption and water permeation layer, a porous mesh bag layer and a surface channel layer from bottom to top, wherein the porous mesh bag layer is a three-dimensional mesh-bag-like interpenetrating network resin formed by cross-linking cellulose or carboxymethyl cellulose sodium or starch and cation modified polyacrylamide, or a three-dimensional mesh-bag-like interpenetrating network resin formed by cross-linking polyacrylamide or cellulose or carboxymethyl cellulose sodium and cation modified starch so as to significantly increase the ink absorption. According to the present invention, the water permeability is increased by regulating the composition of the resin and controlling the network density, such that the water molecules rapidly enter the water absorption and water permeation layer; and the instant-drying type high-ink-absorption heat sublimation transfer printing digital paper has characteristics of high ink absorption capacity, rapid ink absorption, instant drying after printing, good transfer printing effect and the like, and meets the fast printing and efficient production requirements of various dark fabrics.