The invention discloses a method for repairing a submerged-arc welding conductive nozzle based on low-pressure cold spraying technology. The method comprises the following steps that S1, blasting treatment is performed on the damaged submerged-arc welding conductive nozzle before spraying; S2, omni-directional cold spraying repair treatment is performed on the damaged submerged arc welding nozzlesubjected to sand blasting treatment by adopting a self-made powder material, wherein the spraying parameters are as follows: cold spraying working gas is compressed air, the carrying temperature is 450-500 DEG C, the carrier gas pressure is 0.6-0.8 MPa, the spraying distance is 10-20mm, and the spraying speed is 0.4-0.6m/s; and S3, the repaired submerged arc welding conductive nozzle is put intoa heat treatment furnace, and after heat treatment for 2 hours, the submerged arc welding conductive nozzle is cooled with the furnace and taken out, and the repaired conductive nozzle is obtained. According to the method, the worn part of the submerged-arc welding conductive nozzle is repaired through the self-made powder, the use function of the conductive nozzle is restored, the cost is saved,the wear resistance of the submerged-arc welding conductive nozzle is improved, and the service life of the submerged-arc welding conductive nozzle is prolonged.