The conducting composites were prepared by blending high density polyethylene (HDPE) as a matrix and polyaniline(PANI) as a conducting polymer in xylene. The PANI was protonated with dodecylbenznesulfonic acid(DBSA). The film of composite was prepared by compression molding. The electrical conductivity was measured by 4 probes method with the amount of PANI and temperature. When the content of PANI was 25wt%, the electrical conductivity of composite increased up to 2.62 S/cm. The percolation threshold showed at the vicinity of 15 wt% PANI content.