Abstract: Surface charge accumulation on insulators under DC voltage can cause electric field distortion and lead to surface discharge and even insulation failure at gas-solid interface. Therefore, it is of great significance to study the characteristics of surface charge accumulation and dissipation. In order to study the influence of electrode contact mode on the surface charge accumulation and dissipation characteristics of epoxy resin, this paper simulates two contact modes between electrode and insulator, namely close contact and non-close contact, by applying or not applying conductive adhesive on the contact surface of electrode and epoxy resin. The influence of different contact modes between metal and solid dielectric on the surface charge accumulation and dissipation characteristics of insulator under DC voltage is studied. The experimental results show that when the electrode and insulator are in close contact, the charge with the same polarity as the applied voltage is mainly accumulated on the surface of the material, when the electrode and insulator are not in close contact, the charge with the opposite polarity of the applied voltage is mainly accumulated on the surface of the material. At the same time, the total amount of charge accumulation under different contact modes is significantly different with increasing pressure time. In the process of dissipation, the surface charge migration is dominant in the two contact modes, and the charge distribution area shows a significant contraction phenomenon, and the charge dissipation rate in the close contact mode is faster than that in the non-close contact mode.