Abstract: Considering the geometric nonlinearity of Flexible Structures, the paper adopted the explicit dynamic method to analyze the transition of the wrinkles in the tension plane membrane by use of shell elements based on ansys/ls-dyna package. The transition of the membrane wrinkles was divided into three states, imperfection state, micro wrinkles state and macro wrinkles state. The features of each state were simulated. The tensioned membranes with different initial imperfections were calculated and analyzed. The influences of initial imperfections in each state were described and compared. The results show that the transition levels can be measured more effectively by dividing the process into three states. In addition, the tensioned membrane in each state can be described and analyzed effectively and conveniently.