This paper reviews the literature on linear friction welding (LFW) of Ni-based superalloys, which are crucial materials in high-temperature applications such as aerospace and nuclear energy. LFW is a solid-state joining technology that offers near-net-forming characteristics, making it suitable for manufacturing and repairing aerospace components. The review aims to understand the characteristics of frictional heat generation, extrusion deformation, microstructures, mechanical properties, flash morphology, residual stresses, creep, and fatigue in Ni-based superalloy weldments produced by LFW. The process involves four stages: initial, transition, equilibrium, and deceleration. Compared to fusion welding, LFW avoids issues like solidification cracking and alloy segregation, making it more suitable for manufacturing dual-performance blisks with high thrust-to-weight ratios. Numerical simulations, particularly 3D models, have been used to study the deformation behavior and physical fields associated with LFW, providing valuable insights into the process's fundamental laws and optimizing its application.This paper reviews the literature on linear friction welding (LFW) of Ni-based superalloys, which are crucial materials in high-temperature applications such as aerospace and nuclear energy. LFW is a solid-state joining technology that offers near-net-forming characteristics, making it suitable for manufacturing and repairing aerospace components. The review aims to understand the characteristics of frictional heat generation, extrusion deformation, microstructures, mechanical properties, flash morphology, residual stresses, creep, and fatigue in Ni-based superalloy weldments produced by LFW. The process involves four stages: initial, transition, equilibrium, and deceleration. Compared to fusion welding, LFW avoids issues like solidification cracking and alloy segregation, making it more suitable for manufacturing dual-performance blisks with high thrust-to-weight ratios. Numerical simulations, particularly 3D models, have been used to study the deformation behavior and physical fields associated with LFW, providing valuable insights into the process's fundamental laws and optimizing its application.