As an important aspect in the field of robotics, the sixdegreeoffreedom (6DOF) platform has more and more become a focus of recent application and research, which is characterized by the high rigidity, large load handling capability, small inertia nonaccumulation of position error, easy force feedback control, and other advantages. Through analyzing the structure and kinetic model of the 6DOF parallel platform, a global optimal forward displacement analysis method was presented based on Differential Evolution (DE) algorithm. The DE method could be achieved of good optimization performance by using the relative information of three genes, which was based on fully referenced to traditional generic algorithm (GA) method. The proposed method could be easily applied by employed the real number encoding strategy. The simulation results illustrate very good optimization function acted by the proposed method.