Nanosized (La0.47Gd0.2)Sr0.33MnO3 perovskite oxides were prepared at relatively low calcinating temperature of 600 ℃ and 800 ℃ for 10 h using amorphous complex precursor. Curie temperature (Tc) and magnetocaloric effects(MCE) were investigated. X-ray diffraction(XRD) and electron diffraction(ED) reveal that the resulting products are of pure single-phase rhombohedral perovskite structure. Transmission electron microscopy (TEM) observation finds that the particle sizes are about 40 - 50 nm and 80 - 100 nm, and the Tc are 285.1 K and with a broad peak around Curie temperature is observed in sample sintered at 800 ℃ for 10 h. This suggests that nanosized (La0.47Gd0.2)Sr0.33MnO3 is a suitable material as working substance in magnetic refrigeration in room temperature.