The invention discloses a drying device used for laser cladding powder. The drying device used for the laser cladding powder comprises a drying pipe, a cylinder body, a tube-shaped heating piece and a powder storage cylinder. The drying device used for the laser cladding powder is provided with a spiral pipeline to enable the powder to be suspended in the air for a long time so as to facilitate conducting drying treatment on the powder, and it is beneficial to improving the drying effect and the product quality. Various bad influences brought by damping of the laser cladding powder are overcome, and the cladding powder is subjected to drying treatment rapidly and efficiently. The drying device serves as a preceding stage of a powder feeder in the laser cladding process, so that cladding powder is preheated in the laser cladding process; the preheated cladding powder can significantly reduce thermal stress in the cladding process, restrain generating of cracks of a cladding later in the cladding process, significantly improve the thermal stress situation in the cladding process and improve the quality of laser cladding.