Abstract: Against the background of the rapid changes in contemporary engineering science and technology, technological innovations in new machinery and equipment face unprecedented challenges in terms of the performance of key components. Mechanical equipment possesses the advantages about high efficiency, stability, and long-life operation, the wide temperature range bonded solid lubrication protective coatings are one of the important key of which, in the context of scientific research and engineering, the enhancement of the service life of such materials represents a crucial challenge that must be urgently addressed. This paper fully took into account the unique chemical structure and bonding characteristics of inorganic phosphates, precisely regulated the proportional relationship between them and other functional components, designed and prepared inorganic phosphate bonded solid lubrication coating materials with wide-temperature-range lubrication performance, and systematically studied the wide-temperature-range tribological behaviors and wear mechanisms of the prepared coating materials under different friction pairs. The research results showed that the prepared inorganic phosphate bonded solid lubrication coating had good tribological properties within the temperature range of 25 ℃ to 600 ℃, and its average friction coefficient was below 0.25. Meanwhile, when the coating was rubbed against different friction pairs, the variation in the friction coefficient of the coating at room temperature was not significant, ranging from 0.16 to 0.18. Through the analysis of the microscopic wear morphology, its main wear mechanism was abrasive wear. At 200 ℃ and 400 ℃, the tribological performance of the coating when rubbed against the surface-plated Cr₂O₃ small balls (GCr₂O₃ balls) was the best, with its average friction coefficient being lower than 0.1, which was mainly due to the good high-temperature lubrication performance of the Cr₂O₃ film itself. At 600 ℃, the lubricating fillers such as MoS₂ and graphite in the coating were oxidized and failed in a short period under the combined coupling effect of high-temperature oxidation and frictional shear force, and the newly formed molybdate phases in situ played a role in high-temperature lubrication. Under the coupling effect of high temperature and frictional shear force, the surface plating on the counterpart surface was worn out in a short period, and the difference in the influence of the counterpart material on the tribological performance of the coating could be almost ignored, resulting in similar variation trends of the friction coefficient of the composite coating under different friction pairs and an increase in the wear rate to the order of 10⁻⁴ mm³/(N·m). At this time, the wear mechanism was mainly abrasive, adhesive, and fatigue wear under the combined action of high-temperature oxidation and frictional shear force. It was worth noting that in a high-temperature environment, the Ag element showed a tendency to migrate more easily to the surface of the Cr₂O₃ film layer.