In order to study the tribological properties of different piston ring coatings and cylinder liner at different temperatures under the condition of lack of lubricating oil,five commercial piston ring coatings were selected,and the cross-sectional morphologies of different coatings were observed by scanning electron microscope.Using a reciprocating friction and wear tester, the friction and wear tests were carried out under the condition of lack of lubricating oil at normal temperature,200℃ and 350℃,respectively.The results show that the CrN-based coating and the CKS coating are mainly adhesive wear,which has a large wear on the cylinder liner,and the tribological properties are stable at different temperatures.The DLC-containing coatings are mainly abrasive wear,which have small friction coefficient at room temperature,but have significant differences at high temperatures.The comprehensive performance of CDC+DLC coating is the best.