With the pure rolling contact of ball-disk as an example,the isothermal elastohydrodynamic lubrication(EHL)under intermittent motion was studiedUsing the multigrid method，the isothermal EHL in ball-disk contact was numerically analyzed.According to the results,with the decreasing of entrainment velocity,central film thickness and minimum film thickness are decreased,when the entrainment velocity reduces to 0,pure squeeze concave oil film shape emerges.When the solids are accelerated again,the concave oil film formed during the stop period passes through the contact region.Correspondingly,the central film thickness is reduced and the minimum film thickness reaches the minimum.Subsequently the oil film thickness is increased and the spike is decreased before reincreasing with the motion.