In order to obtainhigh-precision, high-gloss and high-quality conformal cooling channels die, achieve good cooling effect.The HANS M160 selective laser melting equipmentwas used to test 1.270 9 die steel powder. On the premise of guaranteeing the quality of the formed parts, the surface roughness of the conformal cooling channels was improved. The influence of repeated scanning times and scanning bias on the forming quality was investigated by single factor test method, and the influence of laser profile parameters on the forming quality was compared. The results show that when the laser power is 150 W, the scanning speed is 1 150 mm/s, the scanning distance is 50 μm, the thickness of powder layer is 30 μm, the number of contour scanning is 1, and the scanning bias is 0 mm, the input energy density is 86.96%. The best result is that the hardness is 367 HV0.1, the side roughness is 5.69 μm, and the density is 98.61%. The experimental results show that the forming quality of the parts can be improved by adding laser profile parameters.