Abstract: To investigate the feasibility of laser cladding technique in shaft straightening and what effects the technique will result in under different processing conditions, a relevant test was designed and implemented, where a CO2 laser was used for the shaft specimen whose eccentricity was measured with a dial gauge to indicate the flexibility of the specimen. In the test, the axial angle of laser was changed during laser cladding with both the length and depth of cladding area kept unchanged, then the depth was changed with the cladding area kept unchanged. The test results were verified with actual exemplifications and showed that the shaft is bent towards the laser beam. When the axis angle is smaller than 90°, the shaft flexibility is directly proportional to the cladding area and when the angle is greater than 90°, no obvious change in the flexibility is found. Furthermore, the shaft flexibility is directly proportional to the number of cladding layers if the cladding area is constant. All the results demonstrate that the technique proposed comes up to the expected effect.