Abstract: The present paper deals with a primary study on the impregnation property in the plane of the unidirectional fabric with pure epoxy resin. The effect of the parameters on the dynamics of capillary impregnation wasresearched , such as temperatures , and fiber-resin surface impregnation angles. And a data t reatment method wasproposed to avoid the influence of meniscus at the bottom of the fabric. The result s show that velocity of impregnation can be improved by increasing the temperatures and the impregnation angles.