The invention relates to an oil baffle plate for a high-speed gear case vent cap. The oil baffle plate comprises tungsten carbide, montmorillonite, kaolin, bone black, aluminum oxide, magnesium oxide, copper oxide, ferric oxide, AlN, wollastonite, diopside, talcum powder, an anti-aging agent RD, Fe, ferric hydroxide, Al, Zn, Mn, Cr, Ni, Cu, Mo, Ti, Pd, Pt, W, Ce, Eu, Lu, Au, Ag, Sn, Zr, Re and clay. According to the oil baffle plate for the high-speed gear case vent cap, both the bone black and metal raw materials are added into the raw materials, so that the structural strength of the oil baffle plate is improved, heat dispersion of the oil baffle plate is also greatly strengthened compared with that of a pure ceramic material, the condensation efficiency is improved, and thus the oil baffle efficiency of the oil baffle plate is also improved.