The invention discloses a transfusion auxiliary device with good stability and heating function, which comprises a second semicircular frame, an infusion tube, a U-shaped rod, a semicircular groove, a first semicircular frame, a circular magnet, a handle, an insulating sheet, silica gel Heating sheet, movable seat, ring clamp, thin rod, thermal switch, connecting rod, fixing rod, bolt, bushing, control knob and support rod. The invention has the advantages of simple structure, convenient operation and safe use, which is beneficial to the uniformity of the heating of the liquid medicine in the infusion tube, ensures the comfort of the patient's infusion, is beneficial to the effective control of the heating temperature being too high or too low, and avoids causing the patient to suffer from excessive heating temperature. When discomfort occurs, the effect of stable heating control is achieved. The infusion tube is located in the middle of the hollow tube formed by the first semicircle frame and the second semicircle frame to achieve the effect of uniform heating of the infusion tube with liquid medicine. Through the circular magnet And the handle ensures the firmness that the first semicircular frame is closed on the second semicircular frame.