Elastohydrodynamic lubrication (EHL) theory was used to study the effect of surface waviness on the change of oil film thickness,pressure and temperature rise in the contact zone between bush-pin in industrial chain. The results show that sur- face waviness can cause significant fluctuations in oil film pressure,film thickness and temperature rise. For small equivalent radius of curvature,the amplitude of film thickness waviness is very different from that of surface waviness,approaching 100%. However,with the increase of equivalent radius of curvature,the amplitude of film thickness waviness gradually approaches that of surface waviness,and finally is exactly the same. The variation of amplitude of film thickness waviness is also related to the wavelength of surface waviness. The longer the wavelength,the slower the variation of amplitude of thickness waviness. In some specific cases,the surface with waviness can form a thicker oil film than the smooth surface.