The cobalt oxide @ carbonized wings nanocomposites (Co₃O₄@CW) were prepared by hydrothermal method. The structure and composition of Co₃O₄@CW were characterized by X-ray diffraction(XRD),field emission scanning electron microscope(FESEM),transmission electron microscope (TEM)and the surface area and pore size analyzer. The thermal decomposition of ammonium perchlorate (AP) in the presence of Co₃O₄@CW was investigated by simultaneous thermal analyzer (DSC-TG). Results show that Co₃O₄@CW nanocomposites possess the hierarchical micro-,meso-and macro-porous structure,and Co₃O₄ nanoparticles load on the skeleton of the carbonized wings in uniform and compact form. In which,the load of Co₃O₄ is about 72.0%. The Co₃O₄@CW can significantly reduce the temperature of the high temperature decomposition peak of AP. When the addition amount of Co₃O₄@CW is 3%,it makes the temperature of the high temperature decomposition peak of AP decrease by 147 ℃ and the apparent heat of decomposition increase from 173.4 kJ·mol^-1 to 369.3 kJ·mol^-1,indicating a good catalytic performance.