In order to improving the comprehensive mechanical properties of Mg/Al composite plate for building, the Mg/Al composite plate was rolled under  two rolling conditions of corrugated and flat rolling and flat and flat rolling, and the rolling temperatures were controlled at 250, 300, 350 and 400 ℃. Then，the microstructure was observed and the mechanical property parameters were tested of Mg/Al composite plate. The results show that the Mg/Al composite plates rolled at the rolling temperature of 350 ℃ have good bonding interfaces, and no defect structure is observed. After gradually increasing the rolling temperature, larger magnesium alloy grains are formed. With the increasing of rolling temperature, the tensile strength of rolled Mg/Al composite plate increases first and then decreases, and the maximum value occurs at 350 ℃; the elongation increases monotonically and the flat tensile fracture structure is formed under the condition of corrugated and flat rolling, so that the Mg/Al composite plate has good bonding properties; the bending strength increases first and then decreases, and the maximum value occurs at 350 ℃. Compared with the method of flat and flat rolling, the strength of the composite plate by the method of corrugated and flat rolling is higher. It can be seen that the bending resistance of composite plate can be further improved by the corrugated and flat rolling