Androgen insensitivity syndrome is one of the most common disorders of sexual development. The AR gene test is an accurate method of determining the cause of androgen insensitivity syndrome. Objectives: To present the clinical characteristics, chromosomal formula and sequencing AR gene of patients with antiandrogen syndrome. Methods: We used Sanger sequencing to identify AR gene mutations in 14 patient with androgen insensitivity syndrome. Results: With the application of AR gene sequencing method in androgen insensitive patients, we detected more than times CAG repeats on the AR gene in 5/14 patients with female phenotype, karyotype 46,XY, having SRY gene. , 2 cases have karryotyp 46,XX but have testicular differentiation gene ZFY, 3/14 patients have point mutation in AR gene. This result helps the family to orient the patient's sex and is the basis for prenatal diagnosis in the next birth for the patient's family.