Abstract: Scattering intensity distributions from polyethylene and irradiated polyethylene were experimentally studied by small angle light scattering method and compared with those calculated on two-dimensional truncated spherulite model. The results indicated that both the truncation effect and internal disorder might widen the profile of scattering intensity distribtion curves. The degree of widening increases with the truncation and disorder. The truncation results in the increase of the scattering intensity jn the small angle region while the internal disorder shows influence on the wide angle region. It seems that the internal disorder has much more effect than truncation. The results agree well with that reported in literature.