Lithium metal batteries (LMBs) are attracting increasing attention due to their high theoretical specific capacity. However, the dendrites and dead lithium (Li) formed on Li metal anodes (LMAs) seriously reduce the safety and cycling life of LMBs, hindering the further development. Here, Cl-rich MXene artificial solid electrolyte interphase (ASEI) is coated on the surface of LMAs (M-Li) to improve the cycling performance. The density functional theory (DFT) calculation indicates that the abundant Cl functional group provides sufficient lithiophilic sites, inducing uniform deposition and stripping of Li. In addition, Cl-rich MXene also functions in the formation of halide-rich SEI to regulate the transport of Li ions (Li+). The symmetric battery based on the M-Li anode exhibits low overpotential of 9 mV during the long cycling. The LFP//M-Li full battery maintains a high coulomb efficiency of more than 95 % at the high current density of 5 C. This work suggests that Cl-rich MXene based provides a promising strategy for dendrite-free LMAs in LMBs.