The invention relates to sand lining molding machines suitable for tandem arrangement, and belongs to the field of sand lining of metal molds. Each molding machine comprises a rack, a sand shooting mechanism, a die closing and lifting mechanism, a trolley mechanism, a first roller bed and a second roller bed, wherein the sand shooting mechanism is arranged on an upper beam; the die closing and lifting mechanism and the trolley mechanism are fixed on a lower beam; the trolley mechanism comprises a trolley body, a trolley cylinder, a trolley connecting plate, a trolley rail and a rail bracket; the rail bracket is arranged on the lower beam; the trolley rail is arranged on the rail bracket; the trolley body is movably connected with the trolley rail; the trolley cylinder is fixed on the rail bracket; a piston rod of the trolley cylinder is connected with the trolley connecting plate; the first and second roller beds are arranged on the trolley body. According to the molding machines, when one molding machine carries out sand lining molding, other metal molds can reach other sand lining molding machines or other procedures through a metal mold conveying roller bed, so that the requirements of small-scale metal mold sand lining casting production of castings are met, and the sand lining casting efficiency is improved.