The invention relates to a rhombic configuration type air floatation guide rail. The rhombic configuration type air floatation guide rail comprises a guide rail body, slide carriages and a linear motor, wherein the slide carriages are provided with throttling holes, the slide carriages comprise the upper slide carriage and two side slide carriages, the two ends of the upper slide carriage are connected with one ends of the two side slide carriages correspondingly, the other ends of the side slide carriages are provided with the inclined surfaces, the inclined surfaces are fixed to the corresponding positions of the bottom surface of the guide rail body in a matched mode, a space formed by the slide carriages is of a rhombus-like shape, the guide rail body and the linear motor are arrangedin the inner space defined by the slide carriages, and the linear motor drives the upper slide carriage to move. The rhombic configuration type air floatation guide rail is simple in structure and canbe adjusted according to different equipment requirements; and the rhombus-like guide rail body is designed, so that the size of the guide rail is reduced, the overall height is reduced, the machining cost is saved, the static pressure area is increased, the bearing capacity of the guide rail is improved, the rigidity of the guide rail is improved, and the precision is higher.