The utility model discloses a large -traffic high -lift wear -resisting choma of yellow centrifugal water pump that draws according to the former choma size of water pump, transforms the raw water pump choma, polyurethane material that preferred anti scuffing performance is excellent, and embedded steel sheet net increases the the stiffness and the adhesive strength of structure, and the outer choma of compound polyurethane is moulded in the processing tapping, adopt carbide thick film lining technique, make the interior choma of outlet water pump tungsten carbide. The inside and outside chomaof water pump coordinates the use, compares with the carbon steel choma, and its wearability and life improve more than 5 times, prevents effectively that liquid from plentifully from high nip flow direction low -pressure area, ensureing water pump long -time running in high -efficiency zone, and improvement water feed amount reduces the power consumption to realize water pump saving energy and increasing the efficiency's mesh.