A infiltrationtype elevatedtemperature selflubrication metal ceramics composite was fabricated by infiltrating molten solid SnAgCu into microporous metal ceramics using vacuum high pressure infiltration composite method.The friction and wear behaviors of the composites were investigated using XP5 type high temperature friction and wear tester.The topography of worn surface and the element composition of wear scar were analyzed by means of scanning electron microscopy (SEM) and Xray diffractometry (XRD) separately.The selflubrication mechanism of the composites was discussed.The experimental results indicate that the selflubrication composites have low friction coefficient and wear rate at high temperature of 600 ℃，this is because in the process of friction and wear at elevatedtemperature，solid lubricants are separated out from the micropores of the composites to the friction surfaces to form a lubrication film containing Cu3Sn,CuαSbγ,Fe3Sn,Ag3Sn,with the help of elevatedtemperature,friction heat and stress.This lubrication film shows good selflubrication properties at elevated temperature,and the element Ag in the lubrication film has a great influence on the frictional coefficient.