The present invention discloses process of making high performance composite polyphenyl thioether paper and high performance composite polyphenyl thioether fiber paper. Through synthesizing polyphenyl thioether resin with sodium sulfide and p-dichlorobenzene as main materials; melt spinning the polyphenyl thioether resin into fibril; hot drafting the fibril, curling and cutting to obtain 2-10 mm long short fiber; and a wet paper making process with the short fiber, inorganic stuffing and other reinforcing fiber, high performance composite polyphenyl thioether fiber paper and composite paper are made. The high performance composite polyphenyl thioether paper and the high performance composite polyphenyl thioether fiber paper have high insulating performance or conducting performance, high strength, high fireproofing performance, high chemical corrosion resistance and other advantages, and may be applied widely.