The invention provides an oxidized starch adhesive. The oxidized starch adhesive provided by the invention is prepared from easily available raw materials through a simple preparation method, and is long in storage life, convenient to use, firm in bonding and applicable to bonding of corrugated paper. The preparation method for the oxidized starch adhesive is characterized by comprising the following steps: adding 55.55 parts of starch into 222.2 parts of water and carrying out stirring to form uniform milky starch slurry; slowly adding 31.94 parts of a sodium hydroxide solution (containing 2.78 parts of NaOH) with a concentration of 8% at room temperature and carrying out continuous stirring to form properly gelatinized thick starch paste after about 20 min; then adding 27.7 parts of a potassium permanganate solution (containing 1.15 parts of KMnO4) with a concentration of 4%, wherein the starch slurry turns green from claret and finally turns brown, and the whole oxidation process only takes about 20 min at room temperature; supplementing 55.5 parts of water, carrying out uniform blending, adding 38.33 parts of a sodium hydroxide solution (containing 3.33 parts of NaOH) with a concentration of 8% under stirring, and carrying out stirring for 10 min to allow the starch to be fully gelatinized into uniform transparent coffee starch glue; and adding 61.1 parts of a borax solution (containing 1.2 parts of borax) with a concentration of 20% so as to obtain 500 parts of the oxidized starch adhesive.