The thermal behaviors in the incident shock waves of aluminum nano-particles with average diameter about 75 nm reacting with propylene oxide were studied. The ignition delay time （about 8 μs) of aluminum nano-particles reacting with propylene oxide in the incident shock wave,was experimentally investigated by spectral technology. The reacting temperature was determined to be 3189 K with AlO(B²Σ⁺-X²Σ⁺) strength obtained by the calibrated ICCD. The morphology of the products was studied by the scanning electron microscopy(SEM) image. The results indicate that the reaction products consist mainly of spherical particles. The average diameter is about 70 nm for the sintered products,while a small part of the products are larger than 100 nm as the agglomerating products.