The invention discloses a portable postoperative nursing rehabilitative apparatus for department of surgery. A water pump is started under the control of a timer, so that medicine liquid in a medicine liquid tank enters an enclosure by virtue of an atomizer, and subsequently, atomizing drug therapy is conducted on an incision of a patient; meanwhile, a refrigerator is started under the control of the timer, so that cool air is conveyed into the enclosure to conduct low-temperature bacteriostatic therapy on the incision of the patient; in addition, by adjusting the value of a temperature controller, the refrigerating temperature of the refrigerator is changed, so that the temperature of the cool air is optimized and the bacteriostatic therapy is conducted on the part of the incision of the patient to the greatest extent; and meanwhile, the body temperature of the patient can be detected in real time by virtue of a temperature detection module, and an alarm can make an alarm sound to remind medical personnel to conduct emergency treatment on the patient when the body temperature of the patient exceeds a preset upper limit of the temperature detection module, so that the safety of the patient is greatly improved.