Abstract: SiO₂ nanoparticles were uniformly coated on the surface of metal fibers by electrostatic self-assembly technology.The filter fineness, air-permeability, bubble-point pressure, abrasive resistance, and corrosion resistance of metal fiber felt uncoated and coated SiO₂ nanoparticles by electrostatic self-assembly were investigated.The results show that, the metal fiber felt has good hydrophobicity and flux match after being coated SiO₂ nanoparticles by electrostatic self-assembly, and the filtration accuracy, corrosion resistance, and abrasion resistance of the metal fiber felt are also improved, prolonging the service life of metal fiber felt in the complex corrosive medium.