As oil sand cleaning agent prepared by our own, the grit carries out separation on Inner Mongolia Zha Lai Te Qi oil under ultrasonic. The effects of ultrasonic frequency, ultrasonic intensity, cleaning time, cleaning temperature of oil sand separating were investigated. The results show that under ultrasonic cavitations, under the condition of an ultrasonic frequency of 28 kHz, ultrasonic intensity of 7.06 W/cm2, the ratio of cleansing agent to oil sand 0.8∶1, system temperature 60 ℃ , cleaning time 13 min，the oil extraction rate achieve 94 %. The oil extraction rate is improved greatly under the ultrasonic wave action.