The invention discloses a re-manufacturing method for direct laser cladding of a failed carburized quenching piece. The method comprises the following specific steps that (1), surface treatment is carried out, specifically, surface treatment is performed on the surface of a base body of the failed carburized quenching piece, so that the surface is kept clean and is free of an oxide layer; (2), laser cladding is carried out, specifically, according to a matrix material, a cladding material is selected, a cladding device is selected, process parameters during cladding are set, and laser claddingre-manufacturing repair is carried out on the surface of the treated failed carburized quenching piece; and (3), inspection is carried out, specifically, crack detection and hardness detection are carried out on the carburized quenching piece. When the laser cladding is carried out in the step (2), the used re-manufacturing repair material is a powder material and has a particle size of 150 meshes to 270 meshes; and the repair material comprises the following components of, in percentage by mass, 0.1 wt.%-0.17 wt.% of C, 15 wt.%-18.5 wt.% of Cr, 0.3 wt.%-1.00 wt.% of Mn, 1.0 wt.% -1.5 wt.% ofSi, 1.2 wt.%-2.0 wt.% of Mo, 0.8 wt.%-1.50 wt.% of B, 1.2 wt.%-2.0 wt.% of Ni, and the balance Fe. According to the re-manufacturing method, laser cladding can be carried out without removing a carburized layer, a cladding layer is free of cracks, the forming process is good, and meanwhile, the cladding layer has excellent wear resistance.