The invention discloses silk composite fibers applicable to allergic constitution. The silk composite fibers are characterized by comprising the following materials in parts by weight: 15-20 parts of mulberry silk, 12-14 parts of down feather, 9-11 parts of camel wool, 5-8 parts of aloe fiber, 7-9 parts of banana stem fiber, 6-8 parts of Lycra fibers, 5.6-7.8 parts of coconut-carbon fibers, 1.2-3.1 parts of fatty acid methyl ester ethoxylate, 0.6-1.2 parts of cinnamomum camphora essential oil, 0.8-1.4 parts of calcium alginate, 100-110 parts of 1-butyl-3-methylimidazole dibutyl phosphate, 110-120 parts of 1-ethyl-3-methylimidazole diethyl phosphate, 2-4 parts of liquorice, 1-3 parts of bitter almond kernel, 0.5-0.8 part of sophora alopecuroides, 2-3 parts of folium artemisiae argyi, 3-5 parts of additives and a proper amount of water. Due to addition of the coconut-carbon fibers, the silk composite fibers contain coconut-carbon particles and achieve health effects of activating cells, purifying blood, eliminating fatigue, changing allergic constitution and the like to a human body, and simultaneously, due to addition of other plant fibers, Chinese herbal medicines and other animal protein fibers, the prepared silk composite fibers have health functions of adsorbing odor, resisting moisture, removing odor, resisting ultraviolet rays and the like.