The hydrogenated fullerenelike carbon (FL-C∶H) film is a composite amorphous network structure inlaid with curved graphene.Due to the existence of a curved graphene structure (fullerenelike structure),the film has high hardness and excellent recovery of elasticity and ultralow frictional performance (friction coefficient is from 0.002 to 0.009).The preparation methods of the FL-C∶H film,the control mechanisms of nanostructure,ultralow tribological mechanism and posttreatment effects on the tribological properties of the films are reviewed.The application of FLC∶H films in automotive engines was discussed.It was pointed out that the FL-C∶H film can effectively reduce the friction and wear of engine components and is conducive to the energysaving and emission reduction of the engine.The potential challenges of future engineering applications of FL-C∶H films were briefly summarized.It was pointed out that although FL-C∶H films have superlubricity properties within a controllable range,how to realize superlubricity in full working range and superlubricity in solidliquid composite will be a major research direction in the future.