The invention discloses a method for improving an anti-wrinkle property of cotton fabric, which comprises the following operation steps: (1) after the formed cotton fabric is washed with water, the cotton fabric is placed in an oven at 75 to 85 DEG C for drying for 30-40min; (2) the cotton fabric treated in the step (1) is immersed in a soaking solution for soaking for 2 to 3 hours; (3) the cotton fabric treated in the step (2) is put in saponification liquid for saponification treatment, after being dried, the finished product is obtained. The method for improving the anti-wrinkle property of the cotton fabric provided by the invention has the advantages of simple operation and low cost. The prepared cotton fabric has good flexibility and is not easily discolored, and is less likely to wrinkle during use, thereby greatly enhancing the quality of the cotton fabric.