The head of orbital forming press with double eccentric sleeve structure can realize many kinds of motion trajectory, in which circle and straight line trajectory are widely used. In order to display and analyze the rotary forming process of the orbital head, the motion equations were established based on the motion principle of the orbital head. According to circle and straight line motion trajectory of orbital head and feeding cylinder upward movement of the superimposed blank, the three-dimensional motion trajectory of the orbital head was simulated and its motion regulation was analyzed by MATLAB software. When orbital head moves along circular motion trajectory, orbital forming process is carried on along a spiral curve with fixed orbital angle and not in zero, and orbital forming process is continuous local forming. When orbital head moves along a straight line motion trajectory, orbital forming process is realized along a zigzag curve. Therefore, orbital angular size changes frequently. When the motion curve is passing through the center, the orbital angle is zero, and workpiece forming changes from local deformation to integral deformation. Therefore, the forming force increases accordingly.