In this study, Cuttent vs. Temperature characteristics of polyethylene with high-voltage treatment and crystallinity have been studied. The current curve(I_(th)) shows two peaks at 85[℃] and 50[℃] respectively. Trapping of carriers proceeds during the high-field treatment, and it is clear that I_(th) arises from the drift of carriers under the external voltage(V_b). From the results of TSC of HDPE and LDPE. It is realized that the traps are relation to the crystallinity.