The invention mainly employs monocomponent polyurea as a cementing material, a small amount of thixotropic agents are added properly, and mixed with special-type sand materials to prepare an abrasion-resisting mortar with high elasticity and high cost performance. Through improvement of the construction technology, the construction problems of slow curing speed, difficult levelling of surfaces and the like are overcome. A novel concrete thin-layer abrasion-resisting repairing material is prepared. The novel mortar is a flexible repairing material with good performances, has excellent elasticity besides, and has high intensity, high abrasion-resistance and aging resistance. The repairing material solves the encountered problems during concrete thin layer repairing well, and has unique advantage in concrete thin layer defect repairing aspects. The repairing material has better performances compared to traditional polymer cement mortar and epoxy mortar, can replace the traditional polymer cement mortar and epoxy mortar, and has good repairing effects especially in the repairing of shallow-layer destroy of hydraulic concrete abrasion-resisting positions. The repairing material has good low temperature performance and can maintain certain flexibility at the temperature of minus 45 DEG C.