The 316L stainless steel powder is formed by the selective laser melting technique, and the effects of scanning speed and hatch space on the formation specimen are investigated. When the laser power is 380 W, the layer thickness is 50 μm, the hatch space is 90-130 μm, and the scanning speed is 750 mm·s -1, the density of the formation specimen is up to 99.99%, and the yield strength, tensile strength, and elongation are 625 MPa, 537 MPa, and 38%, respectively. The scanning speed strongly influences the defect formation in the specimens. As for the formation samples, their mechanical properties can be improved and the grains can be refined by suitably increasing the scanning speed.