Disclosed moisture-absorbing air-permeable silk composite fiber is characterized by being prepared from the following raw materials in parts by weight: 16-19 parts of silk, 13-15 parts of camel hair, 7-9 parts of coral fleece, 10-12 parts of ramie fiber, 8-11 parts of PTT short fiber, 5-7 parts of soybean fiber, 2.3-4.7 parts of milk protein fiber, 0.4-0.8 parts of tea polyphenol, 1.2-3.2 parts of plastic starch, 0.3-0.6 parts of sodium pyrophosphate, 1.2-2.4 parts of cocounut oil essence, 100-110 parts of 1-butyl-3-methylimidazolium dibutyl phosphate, 110-120 parts of 1-ethyl-3-methylimidazolium diethylphosphate, 1-2 parts of frankincense, 0.5-0.9 parts of sediment of human urine, 0.6-0.8 part of flos lonicerae, 2-4 parts of an auxiliary agent, and proper amount of water. By adding ramie fiber, the silk composite fiber has functions of resisting bacteria, inhibiting bacteria, eliminating and adsorbing odor, absorbing moisture and breathing, and the like, and by adding tea polyphenol, the improved silk composite fiber also has effects of resisting radiation, being smooth and light, keeping warm and resisting static electricity.