Abstract: Controlling the texture evolution to help tailor the mechanical properties is crucial in the laser powder bed-fusion (L-PBF) of superalloy. Previous studies demonstrated a crystallographic lamellar microstructure (CLM) which had a high strength and high ductility due to the presence of a unique interface between <110>-oriented main and <100>-oriented sub-layer. However, the thorough understanding of their formation mechanism and the control method of the periodic CLM remains nebulous. In this study, the growth behavior of the CLM has been clarified by schematic analysis combined with the transmission electron microscopy (TEM) analysis. Four types of unique periodicity CLM are successfully designed through computational fluid dynamics (CFD) approaches, which provides more potential future directions for developing structural applications in L-PBF directional solidification superalloy.