To optimize hydrodynamic layout of ventilated supercavity vehicle, the experiments have been done in a ventilated cavitation tunnel to study the relationship between tail wings and hydrodynamic of ventilated supercavity vehicle. Forming process of ventilated supercavity was recorded and analyzed. The influences of the tail wings and its wedge angle on the hydrodynamic of ventilated supercavity vehicle were obtained. Experimental results show that the tail wings increase drag coefficient and lift coefficient. Drag coefficient and lift coefficient decrease with the decrease of nature cavitation number. When increasing ventilation rate, drag coefficient and lift coefficient first increase a little and then decrease. The smaller drag coefficient and the bigger lift coefficient can be achieved at bigger tail wing wedge angle.