The invention discloses a nutrient medium carrier for sewage treatment and a preparation method of the nutrient medium carrier, belongs to the field of water treatment, and solves the problem that the conventional nutrient medium carrier can cause secondary pollution easily. The nutrient medium carrier comprises a fatty group substance and hydroxyapatite as a nutrient medium as well as poly(butylene succinate) as a carrier skeleton, and further comprises starch and glycerin capable of modifying the poly(butylene succinate). The preparation method comprises the following steps: fusing the poly(butylene succinate) into a skeleton stock solution; fusing the fatty group substance; stirring the fatty group substance; adding the hydroxyapatite in the solution to form a nutrient medium stock solution; under the fusion state, mixing the skeleton stock solution with the nutrient medium stock solution, and stirring to form a blend solution; injecting the blend solution in a mold to be molded; cooling and curing. According to the invention, the hydrophilia and biocompatibility of the nutrient medium carrier are improved; the nutrient medium components enhance the biological film activity; the bioactivity under a low nutrient concentration is kept; secondary pollution is prevented; the mechanical strength and toughness are high; the nutrients can be released slowly.