Abstract: Thermoplastic polyolefin elastomer (POE) foams were prepared by a batch kettle microcellular foaming technology using supercritical CO2 as a physical foaming agent. The effects of foaming temperature and saturation pressure on the apparent structure and morphology of POE foams were investigated by scanning electron microscopy. The results indicated that the foaming temperature and saturation pressure were the main factors that affected the structure and properties of the foams. The POE foams exhibited a low apparent density and a high expansion ratio when the saturation pressure was set as 10 MPa and the foaming temperature was set at 65 ℃. Under this condition, the POE foams achieved a large internal cell density and a uniform cell distribution.