A hard plate rolling (HPR) method was proposed to develop the AA1060 Al/AZ31B Mg/AA1060 Al composite plate. The results show that the interface of the traditional Al/Mg/Al composite plate is relatively flat. The hard plate rolling can change the stress state of the composite plate by converting the shear force into compressive stress, and form a differential flow at the Al/Mg interface connection. Consequently, the interface profile becomes corrugated, and the interlaced bond between the layers is achieved. The interfacial bonding strength is 64 MPa, which is four times that of traditionally rolled composite plate. The tensile strength of hard-rolled composite plate can be as high as 210 MPa, which is 12.3% higher than that of the traditional rolling method. In conclusion, the hard plate rolling process provides a new idea for the research of forming and manufacturing high-performance Al/Mg/Al heterogeneous composite plates.