A device for manufacturing metal clad plates in way of continuous casting and rolling, comprising base material supplying equipment consisting of uncoiler, pinch roller, shot blasting machine, welding equipment, welding pinch roller, induction heating apparatus, and guiding roller, wherein, the device comprises two base material supplying equipment lines, two base material strips are transported through uncoiler, pinch roller, shot blasting machine, welding equipment, welding pinch roller, induction heating apparatus and guiding roller at different lines, to mould where base material and molten steel are merged; the base material strip enters the mould from above and passes through from below along the inner walls of two sides of the mould, wherein the two inner walls of the mould being sealed with side seal plates; a tundish for casting molten steel is provided above the mould; the molten steel flows from the tundish into the mould and comes into contact with the base material strip in the mould, so that a preliminary melt merging takes place; upon preliminary melt merging, the base material strip forms a composite slab and passes through the mould from below, and is cooled at a secondary cooling section with cooling-spray located at the outlet of the lower part the mould; a ski pass roll is provided after the secondary cooling section, and after the ski pass roll provided is a rolling mill for making the composite slabs into composite strips with different size and specification; an on-line cooling equipment for the composite strips is provided after the rolling mill, a leveler is provided at the exit of the on-line cooling equipment; the leveled composite strip is then cut to fixed length by a cut-to-length shear or is coiled by a coiler. the device comprises two base material supplying equipment lines, two base material strips are transported through uncoiler, pinch roller, shot blasting machine, welding equipment, welding pinch roller, induction heating apparatus and guiding roller at different lines, to mould where base material and molten steel are merged; the base material strip enters the mould from above and passes through from below along the inner walls of two sides of the mould, wherein the two inner walls of the mould being sealed with side seal plates; a tundish for casting molten steel is provided above the mould; the molten steel flows from the tundish into the mould and comes into contact with the base material strip in the mould, so that a preliminary melt merging takes place; upon preliminary melt merging, the base material strip forms a composite slab and passes through the mould from below, and is cooled at a secondary cooling section with cooling-spray located at the outlet of the lower part the mould; a ski pass roll is provided after the secondary cooling section, and after the ski pass roll provided is a rolling mill for making the composite slabs into composite strips with different size and specification; an on-line cooling equipment for the composite strips is provided after the rolling mill, a leveler is provided at the exit of the on-line cooling equipment; the leveled composite strip is then cut to fixed length by a cut-to-length shear or is coiled by a coiler.