The invention relates to a coated fertilizer for rice seeds. The coated fertilizer is prepared from a fertilizer A, a membrane material B and a packing C through grinding. The fertilizer A is prepared from urea, a calcium magnesium phosphate fertilizer, potassium sulphate, amicro-element fertilizer zinc oxide and an oxygenescape agent calcium peroxide. The membrane material B is hydroxypropyl chitosan. The packing C is argil. The coated fertilizer is a novel slow release fertilizer for conducting rice seed coating and fertilizer supporting treatment and wrapping the surfaces of the seeds to form a coating film, and a lasting period is 52-70 days. The coated fertilizer is suitable for coating and fertilizer supporting treatment of all types of rice seeds, direct sowing or rice seedling transplantation, can promote rice seed germination, rice seedling growth and effective tillage. The percentage establishment of seedlings is 11.9%-16.2%, seeds are saved by 10.2%-15.5%, and the fertilizer is saved by 26.6%-35.8%. The coated fertilizer is simple in production process, low in cost and convenient to use and has good economic, social and ecological benefits.