In order to simulate the movement of cylinder linerpiston ring in internal combustion engine,a reciprocating testrig to measure the tribological performance of cylinder linerpiston ring system was designed,which consists of transmitting system,heating system and loading system.According to the different operating requirement for the cantilever beam and sample fixing device,the structural design and finite element analysis was carried out for these two parts respectively.The result shows that designed cantilever beam and sample fixing device can meet the requirement under the limit experimental condition(heating to 130 ℃,friction 500 N).The 2dimension force sensor used on the testrig can measure friction and normal load simultaneously by special assembly design.By the friction and wear experimental verification,the friction coefficient of the cylinder linerpiston ring is decreased rapidly along with the increasing of speed in low load condition(617,926 and 1234 N),and the friction coefficient is decreased slightly and gradually tends to be stable along with the increasing of speed in high load condition（2508 and 3225 N）.