In order to study the influence of aerodynamic characteristics on the twist fin vehicle, twist rate and average attack angle was introduced to represent geometric features of tail. By solving the N-S equations in standing state in rotating frame, a numerical simulation of the aerodynamic characteristics of cruciform layout twist fin vehicle was made . The results show that the twist fin can increase the rolling moment and balancing speed of aircraft and the balancing speed is proportional to the twist rate. When the twist rate increases, the twist fin’s initial resistance coefficient increases. When the balancing speed is reached, the resistance coefficient will decrease. In the critical twist rate, increased with the twist rate, the wing surface pressure distribution will be improved effectively at the balancing speed. The research results have reference value for the aerodynamic configuration design stability design of vehicle.