Abstract: The selective laser melting (SLM) was carried out to form Inconel 718 alloy. The effects of the process, including scanning method and laser remelting, on the mechanical properties of Inconel 718 alloy were investigated by examining tensile strength, elongation, hardness and relative densities as well as microstructure.The results show that both the scanning method and the laser remelting have an effect on the mechanical properties.The scanning method has a greater effect on the tensile strength and a smaller effect on the relative densities, with the highest tensile strength of 1059 MPa for continuous scanning method and higher than that of castings, and the elongation of different scanning methods is higher than 21%; laser remelting reduces porosity defects and increases the relative densities to more than 99%, but causes grain coarsening and crack expansion. The difference in tensile strength between the different scanning methods before and after remelting is less than 1%.At high temperature, the elongation under continuous scanning method improves by 15%.