In this paper, sugar alcohol chelated calcium (SACC) was synthesized by the method of heating in constant temperature water bath, and then conducted a field spraying experiment with our SACC and SACC by Brandt Company of USA (marketed SACC) to study their effects on the yield and quality of potatoes, and the absorption, migration and transformation of calcium. The results showed that compared with no application of calcium fertilizer (spraying equal amount of clear water), our and marketed SACCs increased potato yield by 10.9% and 12.1% respectively; increased the rate of big potatoes by 5.4% and 3.7% respectively, indicating SACC reduced the proportion of medium and small potatoes; decreased nitrate nitrogen contents in potato tubers by 28.8% and 31.6% respectively. Our SACC increased soluble protein content and nitrogen accumulation in potatoes by 7.2% and 20.9% respectively, while marketed SACC decreased them both by 3.2%. Besides, both our and marketed SACCs increased calcium contents in potato organs, at harvest, calcium contents were increased by 8.0% and 9.0% in roots, 10.1% and 6.8% in stems, 1.8% and 6.8% in leaves, 26.7% and 20.0% in tubers, respectively. In addition, both our and marketed SACCs increased calcium accumulation in potato organs and whole plant, both increased by 20.0% in roots, 97.1% and 55.7% in stems, 56.5% and 45.8% in leaves, 56.3% and 50.0% in tubers, 62.1% and 47.0% in whole plants. Calcium accumulations in various organs and whole plant treated by our SACC were all significantly higher than those treated with marketed one. In conclusion, both SACCs can promote potato yield, but ours were more conductive to the absorption and migration of calcium than marketed.