The invention relates to the field of medical treatment, in particular to a blood therapeutic instrument with a disinfection and sterilization function. It comprises a blood therapeutic instrument body. An irradiation cavity is arranged above the blood therapeutic instrument body. Blood bags and laser UVLED or ordinary UVLED sterilization equipment are arranged in the irradiation cavity. Both endsof the blood bag are connected with a clamp. One end of the oxygen guide pipe is connected with the blood bag. The other end of the oxygen guide pipe is connected with an oxygen gas cylinder. A control panel is arranged on the main body of the blood therapeutic instrument. The control panel comprises a power supply control key, a time comparator, a temperature controller and a state display screen. The wavelength of deep ultraviolet laser UVLED or the common UVLED lamp is in the range of 200-350nm. The technology is more advanced. The structure is simple and the heating property is low. It can be started without preheating. The invention has the advantages of low energy consumption, long service life, stable emission wavelength, without pollution to the environment. The invention has strong practicability.