Two types of Al-Teflon specimens were obtained by different heat treatment processes(type A: sintering temperature 380 ℃, cooling rate 50 ℃·h^-1; type B: sintering temperature 350 ℃, cooling rate 70 ℃·h^-1). The reaction phenomenon of two kinds of specimens was tested via quasi-static compression test. The stress-strain curves were obtained. The measurement of density, micro morphology analysis of SEM and observations of high speed photography of the specimens were performed. Results show that a violent exothermic reaction is occurred for type B specimen, while no reaction is occurred for type A specimen. The strain hardening modulus of type B specimen is 5.3 times higher than that of type A specimen. The reaction zone of type B specimen in the stress and strain plane is between true strain of 1.2 and 2.2 and true stress of 60 MPa and 80 MPa. The crystallinity of two types of specimens is 63% for type A and 43% for type B. The crystallinity of two types of Al-Teflon materials is different. A great deal of nanometer Teflon fibrils is found in type A specimen, which may hinder the crack propagation of materials. The reaction phenomenon of type B specimen is closely related to phenomenon of strong shear stress and brittle fractures of the specimen.