The invention discloses a method for preparing high-strength corrugated base paper from straws and relates to the field of cellulose papermaking. The method comprises the following steps: drying straws, separating straw peel and straw pulp, treating the straw peel into sections, soaking in a NaOH solution or a KOH solution, performing secondary pulping, screening the pulp after pulping, washing tobe neutral after pulp screening, and dewatering for later use; grinding the straw pulp, mixing the straw pulp powder with the NaOH solution or the KOH solution, soaking the material and washing to beneutral, adding water to obtain straw pulp slurry, adding peroxyacetic acid into the straw pulp slurry or adding a hydrochloric acid solution into the straw pulp slurry to regulate the pH value of the straw pulp slurry to be 3 or less; and stirring or shaking the straw pulp slurry, washing to be neutral, mixing with the straw peel pulp, and making the corrugated base paper by utilizing the mixedpaper pulp. According to the method disclosed by the invention, the selected raw materials are rich, the production process is simple, the reaction time is short, the time consumption is low, the energy consumption is low, and recycling of agricultural wastes is facilitated.