Abstract: Based on virtual numerical simulation technology,this paper establishes a criticality evaluation method for minimum control velocity on ground( V_MCG),and V_MCGof an aircraft under the conditions of different weight and center of gravity is simulated and evaluated by using this method. According to the evaluating results,the more critical weight and center of gravity in V_MCGtest is given,which can provide reference for criticality evaluation of V_MCGand V_MCGtest of other aircraft.