Abstract: Composites with both antistatic and antibacterial properties are widely used in fields including food packaging, medical devices, and electronic equipment. However, achieving durability and performance enhancement remains a pressing issue demanding resolution for these properties. In this study, cetyltrimethylammonium chloride (CTAC)/high-density polyethylene (HDPE) composites were fabricated through the self-assembly of CTAC and HDPE in an aqueous solution, followed by drying, cold pressing and thermal processing. The materials were characterized using FTIR, XRD, XPS, SEM, water contact angle measurements, mechanical testing, antistatic and antibacterial performance evaluations. The results indicated that the composites formed a distinct segregated structure. The surface resistance (R_s) of the material exhibited a trend of sharp initial decrease followed by gradual leveling off with increasing CTAC content. With only 1wt% CTAC addition, R_s decreased to 1.62×10⁸ Ω, meeting the requirement for electrostatic dissipation. And its R_s was maintained at 1.87×10⁸ Ω after 500 rubbing cycles, demonstrating excellent antistatic rubbing durability. Furthermore, the composite with CTAC loadings of 1wt%, 5wt%, and 10wt% exhibited highly effective antibacterial activity against Staphylococcus aureus (antibacterial rate≥99.9%). The fabrication process is simple yet efficient, providing new insights for developing high-performance antistatic and antibacterial comp osites.