Based on TRIZ theory,a traction tester of elastohydrodynamic lubrication point contact was designed, which was made up of a ball disks and a stepped shaft with the concave surface.Through the analysis of the traditional two-disc machine and ball-disks machine, the technical contradiction and the physical contradiction were studied, which was for the purpose of improving the applicability and versatility.According to the contradiction matrix of TRIZ, the recommended inventive principles were obtained, which were adopted in the improvement of design of ball-disks machine.A new type of EHL traction tester was designed.The tester can continuously measure the EHL traction under different spin values with simple and convenient operation, and it can simulate the typical working conditions of torus-type continuously variable transmission and rolling bearings.The results show that the innovative design of EHL Point contact traction tester is successfully achieved by TRIZ,and the TRIZ theory can be effective to guide the product design.