Abstract: With the prerequisite for reasonable selection of sintering aids,a method of manufacturing Al/Al₂O₃ ceramic matrix composite sintered at low temperature has been introduced. The results show that the sintering aids and reactive products are in fluid state at a temperature over 800℃,producing viscous flow,which promotes the relative movement of solid particles and forms compact heap so as to result in volume shrinkage and densification. Below 1000℃,the fluidity of the fluid increases with the rise of temperature,thus the sintering process can thoroughly conduct and enable to obviously improve the properties of materials. But such phonomena will not be obvious at a temperature over 1000℃. Therefore it is suitable to select 1000℃ as the sintering temperature of Al/Al₂O₃ ceramic matrix composite.