Fecha de publicación: 03/07/2020 Fuente: WIPO "circular economy" The invention relates to the technical field of straw papermaking research, and discloses a method for relieving yellowing of paper prepared from agricultural straws, and solves the problem that the paper pulp performance is weakened due to the fact that xylanase is adopted to treat part of hemi-cellulose in the prior art through the research of agricultural straw structural components and paper pulp yellowing performance. The hemi-cellulose is modified by a prepared porous material, so that the influence degree of the hemi-cellulose on paper pulp yellowing is reduced, the use amount of a bleaching reagent is reduced, the bleaching time is shortened, the whiteness is remarkably increased, the whiteness reaches 80-86% ISO, and the requirements of cultural paper are met. The problem of yellowing of paper prepared from agricultural straws is solved, and the hemi-cellulose is prevented from being subjected to methanol removal reaction under alkaline and high-temperature conditions to formdouble bonds unfavorable for bleaching. The whiteness value of paper pulp after bleaching is high, and residual chlorine in bleaching waste liquid is low. The comprehensive utilization rate of agricultural straws is increased, the use of other auxiliary additives is reduced, and the cost is reduced.