The invention discloses a professional nursing device for chemotherapy in medical oncology, and particularly relates to the field of medical-care auxiliary apparatuses. The professional nursing devicecomprises a base, wherein a placing box is fixedly arranged at the upper end of the base, a sealing plate is arranged in one end located in the placing box of a connecting pipe, sliding grooves are formed in side walls of two ends of the inner part of the connecting pipe, the sealing plate is arranged in the corresponding sliding groove in a sliding manner, one end of the sealing plate is arranged in the manner of penetrating through the side wall of the connecting pipe, a pull rope is fixedly connected to one end located on one side of the outer end of the connecting pipe, of the sealing plate, one end of the pull rope is fixedly arranged on a winding wheel through a guiding wheel, a winding cylinder is fixedly arranged on a rotating shaft, and one end of the rotating shaft is arranged on a rotating wheel arranged at the upper end of the placing box through a leather belt in a connecting manner, and a second reset spring is fixedly arranged on the side wall of the outer end of the connecting pipe. According to the professional nursing device, patients can conveniently enable vomitus to flow into a vomiting bag, and the condition that smell given out by the vomitus causes uncomfortable experience to the patients can also be avoided.