Anode-free sodium metal batteries (SMBs) have gained significant attention due to the abundance of their material resources and their high energy densities. However, their practical application is hindered by their unstable cycling performance, continuous sodium consumption, and dendrite growth characteristics. In this study, fluorine-doped micropore-covered mesoporous carbon fibers (FMCNFs) engineered to enhance the sodiophilicity and cycling performance properties of anode-free SMBs are presented. The introduction of electronegative fluorine generates more Lewis acid sites and sodiophilic Zn-Nx sites, thereby suppressing electrolyte overdecomposition and promoting uniform Na metal deposition. Structural modifications are implemented to create a micropore-covered mesoporous framework, resulting in the formation of a thin, uniform solid electrolyte interphase that facilitates Na metal confinement and self-smoothing. The FMCNF current collector exhibits an ultralow Na nucleation overpotential and rapid Na thermal infusion (with the level of Na loading reaching 97 wt.%), demonstrating highly reversible Na plating/stripping for more than 5000 cycles with an average Coulombic efficiency of 99.93% at a high current density of 5 mA cm−2. In symmetric cells, FMCNF achieves an ultrahigh Na utilization of 94% and a stable cycling life for over 2000 hours at 10 mA cm−2/10 mA h cm−2. Furthermore, anode-free pouch cell with high-loading cathodes achieves stable cycling characteristics for 200 cycles with capacity retention levels of 90%. These findings demonstrate the efficacies of tailoring the compositions and microstructures of porous carbon current collectors for enhancing the cycling life and stability characteristics of anode-free SMBs.