In this paper, Inconel 718 alloys with different remelting scanning angles (0 °, 67 °, 90 °) were prepared based on SLM technology. The microstructure and texture evolution of the as-deposited experimental alloy before and after remelting were characterized by XRD, OM, SEM, EBSD and TEM. The results show that the remelting alloy is mainly composed of laves phase and a small amount of carbonitride and Al2O3 containing Nb and Ti elements. After remelting, the fish-scale molten pool in the alloy becomes wider and shallower, and the columnar crystals in the alloy grow obviously along the printing direction and the width increases. This is mainly due to the secondary heat input of the first molten pool under the same powder layer by remelting, which provides a driving force for the continuous growth of columnar crystals. After remelting, the preferred orientation strength of the alloy increases significantly, and it has a strong cubic texture. As the remelting angle increases, the texture strength increases. The columnar crystals in the alloy before and after remelting are mainly epitaxial growth. The remelting angle can induce the transformation of the grains in the overlapping area of two adjacent molten pools in the same powder layer from random orientation growth to columnar crystal epitaxial competitive growth mechanism, and different remelting angles affect the internal orientation gradient distribution direction of columnar crystals in the overlapping area.