Abstract: In order to improve the performance of the vibration scarifier, speed characteristic and trajectory behavior of vibration loosen soil was studied. At the lower frequency with the velocity ratio less than 1, the cutting blade always moved forward to the soil. As the frequency increased and the velocity ratio was greater than 1, the cutting blade moved backward to the soil during part of each cycle. Therefore, the cutting blade went through three phases, namely soil cutting, backing off and catching up respectively. As velocity ratio increasing, the time consumption of different phases changed steadily. When the tines were vibrated with amplitude at the tip of ±12.7 mm and an oscillation angle of 28°using a forward speed of 1 km/h, a soil-bin test was conducted under the frequency of vibration was varied from 0 to 10Hz. Experimental results showed that traction resistance decreased by 40% and power consumption decreased by 11.7%-59% with an optimum vibration frequency of 4.4 Hz.