The invention discloses bone-strengthening calcium-supplement alum-free sweet potato vermicelli. The bone-strengthening calcium-supplement alum-free sweet potato vermicelli is characterized by comprising the following raw materials in parts by weight: 350-400 parts of sweet potato starch, 18-20 parts of green bean starch, 1.4-1.6 parts of xanthan gum, 1-1.2 parts of composite phosphate, 25-30 parts of nori, 20-24 parts of carrots, 8-12 parts of apricot kernels, 10-14 parts of soybeans, 12-16 parts of oat, 5-7 parts of dried small shrimps, 13-15 parts of walnut powder, 4-8 parts of pollen pini, 8-10 parts of skim milk powder, 6-8 parts of fructus psoraleae, 5-7 parts of rehmannia, 3-5 parts of rhizoma drynariae and 4-6 parts of corn cervi pantotrichum. According to the sweet potato vermicelli, the green bean starch, xanthan gum and composite phosphate are adopted to replace the traditional alum, not only are the toughness and elasticity of vermicelli increased, but also the broken rate of vermicelli in boiling is reduced; the raw materials, including nori, carrots, apricot kernels and the like increase the nutritional value of vermicelli; and the traditional Chinese medicine components, including fructus psoraleae, rehmannia and the like enable the vermicelli to have the health efficacies of strengthening bone, supplying calcium and the like, and the economic value of the sweet potato vermicelli is increased.