A six-DOF (degree of freedom) air floatation type motion simulator comprises a translation platform and a posture platform. The translation platform comprises a spherical air bearing, an anti-rollover mechanical limiter, a lifting post assembly, a first air pressure line, a first controller, three planar air bearings, a translation platform mounting panel and a translation platform lithium battery. The posture platform comprises a posture platform mounting panel, 2N air cylinders, a second air pressure line, an iGPS, four cold air nozzle groups, an inertial navigation system, a second controller, three flywheels, a mass center adjustment system and a posture platform lithium battery. The translation platform finishes translational motion in its X and Y directions. The posture platform finishes its rotational motion in X, Y and Z directions of a system of proprio-coordinate and its translational motion along an axis Z, thus simulating spatial posture rotational motion and orbital translational motion of an aircraft.