The invention belongs to the technical field of starch glue, in particular to a method for making papermaking starch glue, which comprises the following steps: a, adding starch and water into a mixing tank, blending to obtain a 24 to 30 mass percent concentration, adding amylase, and uniformly stirring; b, delivering the uniformly stirred starch to a pasting tank, introducing steam, heating to 80 to 85 DEG C, and allowing the starch to turn into paste under the action of the amylase within 1.5 to 2 hours; c, delivering the starch paste obtained after the starch turns into paste in the pasting tank to an inactivation tank, intruding steam, heating to 120 to 130 DEG C and inactivating the residue amylase for 3 to 5 minutes; and d, delivering the inactivated starch paste to a storage tank, adding clear water for regulating temperature, keeping the temperature of the starch paste in the storage tank between 75 and 85 DEG C, and obtaining starch glue for later use. In the invention, starch glue obtained by the method is free from flocculation, a glue roller does not dirty when the glue is applied, and the gluing application quality is improved.