Considering the thermal physical properties such as heat transfer coefficient, heat capacity, thermal expansion coefficient, and elastic modulus change with temperature, the temperature field and stress field of the synchronous powder feeding laser cladding process are conducted with direct coupled analysis using the software MSC. Marc. The residual stress distributions under different scanning speeds are studied. The stress distribution along the two paths with one on the surface of the workpiece and the other along the depth of the workpiece is measured, and the results show that the longitudinal stress is much greater than the value of transversal stress. It can be speculated that, along the laser scanning direction, the existence of the residual tensile stress caused by laser cladding is the main reason for cladding layer cracks. When scanning speed increases, the VonMises equivalent peak stress on the surface of the cladding layer also increases, and the curve becomes steeper.