Composite graphite plates (CGPs) have attracted interest due to competitive benefits such as cheaper cost, lower density, and excellent corrosion resistance. Their mechanical and electrical qualities, on the other hand, are insufficient to meet the PEMFC's standards. In this study, a structural design of CGPs with different functional layers is proposed. In order to attain higher electrical conductivity and air tightness, the surface layer was molded graphite plate with resin infiltration treatment, and the middle layer was a carbon fiber fabric (CFF) as a reinforcing functional layer. The results show that the surface layer prepared from flake graphite (FGL) have a density of 2.1 g/cm³, while the surface layer made by expanded graphite (EGL) have a density of about 1.7 g/cm³ with higher porosity. As a result, the CGPs prepared by using FGL as the surface layer has higher airtightness and structural strength. The CFFs must be oxidized to promote the effective bonding with resin, and the addition of carbon nanotubes (CNTs) can effectively improve the interfacial bonding and reduce the area specific resistance (ASR). At a resin content of 20 wt.% with 2 wt.% CNTs in resin, a CGPs with multilayer construction possess a thickness of 0.4 mm, an in-plane conductivity of 446 S/cm, an ASR of 6.4 mΩ·cm², a flexural strength of 72 MPa, and a Helium permeability of around 4.4*10^-6 std cm³/cm²·s. In addition, the graphite particle size has a significant effect on the electrical conductivity, and the analysis on the cross-sectional morphology of the surface layer indicated that this is primarily due to the anisotropic properties of graphite, with larger particle tends to be more orderly distributed after compression resulting in higher in-plane conductivity.