Microstructure change of aluminium/steel interface and cold bending proprety of aluminium-steel composite plate(ASCP) were studied after heating below 650℃.The results showed that interfacial compound was not formed when ASCP was heated below 500C, FeAl (β_(2n)) compound was formed at Al/St interface when ASCP was heatd between 500~650℃. The compound grew into steel in the shape of the growth kinetics equation was 1β_(2n)=9.94exp. When Iβ_(2n)was larger than 30~40 μm,allowable bending angle of ASCP was redc...