Because of the country has a lot of improvement in distribute the electricity power. Underground Cable is a part of system. The testing to find the Partial Discharge inside the cable so that the stem of the High Voltage Cable XLPE is important for testing analysis. From the several study of the Stem Model which is connect to the High Voltage Cable. The example has model by analyze the High Voltage Electric Field from the calculation. But in this article would lead for analytical for finding Electric Field that happen in the cable so that it would be improve the stem model. From the oil transformer insulation and other insulation substance to be the insulation substance in the past to be the insulation which is using gas SF6 to be insulation substance in the stem connection to High Voltage Cable that has present in this research.