Processing process for increasing yield of corn starch

The invention relates to the technical field of agricultural and sideline product processing. The invention discloses a processing process for increasing the yield of corn starch. Through researchinga starch structure and an enzymolysis separation principle, the problems in the prior art that starch purity is not high due to incomplete fiber separation caused by excessive grinding, and the problem of a low powder yield caused by starch residues in slag due to too light grinding are solved. The method comprises the steps of cleaning and impurity removal, softening treatment, extrusion and coarse grinding, enzymolysis separation, and dehydration and air drying. Corn subjected to softening treatment has a loose cell tissue structure; the better the cell wall separation effect is, the more thorough various substances are released, enzymolysis is facilitated, the corn pulping rate and the starch conversion rate can be increased, starch components are kept to a great extent, and corn starchobtained is high in purit