Objective：To study the relationship between propagated sensations and surface electromyography along meridian caused by acupuncture at ‘Quchi’ acupoint. Methods：‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control were acupunc－tured and propagated sensations were caused. Amplitude and muscle active duration of surface electromyography on brachioradialis were recorded. Results：There were significant differences in the positive frequency of propagated sensations along meridian at ‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control（?字2=28.298，P=0.000）. Positive frequency of propagated sensations along meridian was significantly higher at ‘Quchi’ acupoint and non-acupoint of the meridian than at non-acupoint control（?字2=24.783，P=0.000； ?字2=19.113，P=0.000）. ‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control were significantly different in the amplitude and muscle active duration（P=0.000）. Amplitude and muscle active duration showed obvious variation at ‘Quchi’ acupoint than at non-acupoint of the meridian and non-acupoint control. Acupuncture at ‘Quchi’ acupoint，non-acupoint of the meridian and non-acupoint control all caused the amplitude variation of surface electromyography on brachioradialis（P=0.000）. Conclusion：Synchronized surface electromyography on brachioradialis of propagated sensations along meridian caused by acupunc－ture at ‘Quchi’ acupoint is stronger than that caused by acupuncture at non-acupoint of the meridian and non-acupoint control and the effects of acupuncture at ‘Quchi’ acupoint on surface electromyography of brachioradialis show the acupoint specificity.