The effects of the molecular chain structure, silane content, molecular weight and additives on the tribological properties of the coatings were investigated. The results show that the perfluoropolyether silane coating with CF3 group has good hydrophobicity and hydrophobicity, and the contact angle between water and n-hexadecane is more than 113 ?and 66 ? respectively. High molecular weight, high flexibility molecular chain and higher silane content can improve the abrasion resistance of the coating, and the fluorine-containing alcohol additives can improve the friction stability of the coating. At 1035 g load, the water contact angle of Di-Z-perfluoropolyether silane is over 100?after rub 2500 cycles with steel wool.