Abstract: MXene and its composite materials have been widely used in the field of secondary batteries. As a new two-dimensional transition metal carbide layered material, MXene has been widely used in energy storage, adsorption, catalysis and other fields. Constructing composites based on MXene not only improves conductivity and alleviates volume expansion, but also in turn inhibits MXene stacking and obtains better electrochemical performance. In this paper, the synthesis methods of MXene containing fluorine and fluorine-free are reviewed, and the application and performance of MXene and its composites in sodium and potassium-ion batteries are analyzed. Finally, the challenges and prospects of MXene and its composites are elaborated.