A sliding member according to the present disclosure contains, in a sliding layer, a synthetic resin, a solid lubricant, and an additive. The synthetic resin is a polyimide, a polyamide imide, a polybenzimidazole, a polyphenyl sulfone, a polyether sulfone, a polyether ether ketone, or a combination thereof. The solid lubricant is a polytetrafluoroethylene, a tetrafluoroethylene-perfluoroalkoxyethylene copolymer, molybdenum disulfide, a tetrafluoroethylene-hexafluoropropylene copolymer, or a combination thereof. The contained amount of the solid lubricant in the sliding layer is 5.0-40.0 vol. %. The additive is bentonite, smectite clay mineral, silica, a polyamide, or a combination thereof. The contained amount of the additive in the sliding layer is 0.1-9.0 vol. %.

A preparation method of a chelated lithium molybdate lubricant additive includes: adding kaolin and HDTMS into deionized water, performing magnetic stirring and ultrasonic treatment, then stirring to perform a reaction, and after the reaction is finished, filtering, washing and drying a reaction product to obtain alkylated kaolin; adding the alkylated kaolin and APTMS into deionized water, performing magnetic stirring and ultrasonic treatment, then stirring to perform a reaction, and after the reaction is finished, centrifuging, washing and drying a reaction product to obtain amino/alkylated kaolin; adding the amino/alkylated kaolin into a chelated lithium molybdate ionic liquid, stirring for a reaction, and after the reaction is finished, filtering, washing and drying a reaction product to obtain the chelated lithium molybdate lubricant additive. The prepared lubricant additive has good dispersibility in base oil, and performs well in friction reduction and anti-wear.