The utility model discloses a novel slush pump cylinder liner, including cylinder liner base member and duplex coating inside lining, the cylinder liner base member is well mild steel, and the duplex coating inside lining comprises metal transition layer and ceramic surface course, and the thickness of metal transition layer is 50-150 mu m, and the thickness of ceramic surface course is 250-350 mu m, be provided with two assembly grooves on the cylinder liner base member, a cylinder liner base member side is provided with the assembly boss the utility model discloses an at direct spray metal transition layer of cylinder liner base member internal surface and ceramic surface course, avoided the bad problem that appears among the interior overcoat assembling process, can not appear in the use taking out a barrel phenomenon, the overall price / performance ratio is higher, and the thermal mismatching of cylinder liner base member with ceramic surface course has been alleviated to the metal transition layer, has improved the cohesion of base member with ceramic surface course, the pottery surface course has the high rigidity, and good stand wear and tear and corrosion resisting property has improved the life of cylinder liner, has guaranteed probing work efficiency, has reduced use cost, has fine practical value and marketing prospect