The present invention provides a method for treating autism. The method comprises following steps: step 1, applying a first electrical current stimulation of 30 minutes in the vicinity of the Hegu acupuncture point and the Nei guan acupuncture point at one side of the patient, wherein the first electrical current stimulation has a first slow-quick waveform, and the maximum current of the first electrical current stimulation is 3-10 mA; and step 2, applying a second electrical current stimulation of 30 minutes in the vicinity of the Zusanli acupuncture point, and the Sanyinjiao acupuncture point at opposite side of the patient, wherein the second electrical current stimulation has a second slow-quick waveform, and the maximum current of the second electrical current stimulation is 4-15 mA. The above-mentioned method may actually aim at the etiology in the biological and medical aspects, and results in actual therapeutic significance. In the course of treatment, the above-mentioned method is not found to have any side effects, so it can be used for a long time. The present method of the present application is non-invasive and painless, and it is acceptable for children, and suitable for family use. The method can obviously improve the symptoms of autism. The clinical manifestations is an increase of passive and active language, an improvement of social interaction-ability, emotion becoming stable, a better sleep (sleep quickly, a long time). In addition, the method is simple and do not need an acupuncturist.