The invention relates to a medical injection chair, in particular to a medical injection chair with a warm keeping function. The medical injection chair with the warm keeping function achieves the technical purposes that the injection chair can have the warm keeping function, certain personnel items can be placed for patients, and a comfortable infusion environment is provided for the patients. The medical injection chair with the warm keeping function comprises brackets, an injection chair body, armrests, a box body, a placement platform, fixing arms, first rotating shafts, winding reels, pull wires, first sliding rails, first sliding blocks, first springs and the like; the injection chair body is arranged at the tops of the brackets, the armrests are arranged at the two sides of the injection chair body, and the box body is connected to the middle of the injection chair body. According to the medical injection chair, blankets in the box body are utilized to be laid on the injection chair body where the patients sit, the good infusion environment can be provided for the patients during infusion, the blankets can be automatically recycled at the same time, surface impurities of theused blankets are removed, and impurities generated by cleaning the blankets are collected.