The invention provides a casting blank material shifting mechanism and system. The casting blank material shifting mechanism comprises a base and a material shifting machine, wherein the base is arranged on the outer side of a conveying roller way and provided with a cantilever extending in the direction of a material storage table; the material shifting machine comprises a rack, a material shifting assembly and a first blocking assembly; the rack is arranged on the cantilever and located above the end, close to the conveying roller way, of the material storage table; the material shifting assembly is arranged on the rack and makes contact with a casting blank on the material storage table so as to shift the casting blank; the first blocking assembly is arranged on the rack and located above the connecting position of the material storage table and the conveying roller way; and when the material shifting assembly shifts the casting blank to roll to the conveying roller way, the first blocking assembly downwards stretches out to block rolling of the subsequent casting blank. The casting blank material shifting mechanism can shift the casting blank on the material storage table to the conveying roller way in order in a controllable manner, manual participation is not needed, and time and labor are saved.