The invention relates to an antifriction coating layer of a screw compressor, and in particular relates to a screw with a composite molybdenum disulfide antifriction coating layer for a dry type screw compressor. The thickness of a dry film of the antifriction coating layer is 30-50 microns; and the antifriction coating consists of 10-16% of polyester resin, 12-30% of epoxy resin, 6-10% of acrylic resin, 1-6% of molybdenum disulfide, 10-16% of graphite, 1-4% of graphite fluoride, 2-9% of tungsten disulfide, 0-3% of molybdenum diselenide, 1-3% of nano diamond, 1-15% of silicon nitride, 2-10% of aluminium oxide, 0-3% of silicon dioxide, 0-2% of antimony trioxide, 3-15% of silicon carbide and 0-1.5% of carbon nano tube based on the total weight. The antifriction coating layer provided by the invention has good wear resistance and corrosion resistance; and the screw with a composite molybdenum disulfide antifriction layer provided by the invention can guarantee the operation stability of the screw compressor in a dry state, improves the air quality of the compressor, and meets the harsh requirements on the air quality of compressor in the food production, the packaging industry, the pharmacy, the bioengineering, the electroplating industry, the automobile spraying industry and the textile industry.