Semiconductor Laser Therapeutic Instrument has been developed base on modern laser medicine and clinical practice. It adopts low-level laser with the wavelength of 808nm for medical use and 650nm for household use, through specific parts of irradiation and using light radiation of laser and wavelength relation to change the biological characteristics and peel off the fat layer and cholesterol wrapped in the red blood cells, to improve the activity and oxygen carrying capacity as well as the deformability of cells, reduce the concentration of middle molecules in the blood, improve the rheological properties and lower triglycerides and cholesterol, in order to effectively treat and prevent cardiac-cerebral vascular diseases.