The invention discloses a tool for strengthening a blade through the laser cladding technology. The tool comprises a tool body and a handle. The position of a cutting edge line of the tool body is provided with a cladding layer in a cladding manner, wherein the cladding layer is formed by abrasion-resisting hard alloy mixed powder. The hard alloy mixed powder is formed by mixing nickel-base alloy powder and tungsten carbide powder according to the proportion. By mass percent, the nickel-base alloy powder accounts for 40%-70%, and the tungsten carbide powder accounts for 30%-60%. The nickel-base alloy powder comprises, by mass percent, 18%-23% of Cr, 4%-7% of Fe, 2%-4.5% of Nb, 8%-11.5% of Mo, 0.2%-0.4% of Al, 1%-2.5% of Ti, 0.1%-0.6% of C, 0.2%-0.5% of Si, 0.2%-0.6% of Mn, 1.5%-2.5% of V and the balance Ni. The tool has the beneficial effects that the cladding layer and the tool body are in well metallurgy combination, the structure of the cladding layer is fine and uniform, and the dilution rate is low; after the tool body is sharpened, the hardness, sharpness, abrasion resistance and corrosion resistance of a blade part are greatly improved, cost is low, the hardness of the blade part is improved, and meanwhile tenacity cannot be reduced.