Objective To analyze the clinical treatment in patients with nevus of Ota with Q switched Nd∶YAG Laser. Methods Total 326 patients nevus of Ota were treated. According to the shade of pigment, age and gender of the patients, the different technical parameters were selected. Results After 2 4 times of treatment, excellent results were obtained in 221 patients, good in 74 patients, and improved in 31 patinets. The total effective rate was 90.5 %. After treatment, the skin exposured to the laser in the patients had reaction of continued pigmentation in different degree. Usually, the above reaction will gradually disappeared without any scar formation. Conclusion Satisfactory results are obtained in patients with nevus of Ota treated with Q switched Nd∶YAG laser. [