G SLT Semiconductor laser treatment instrument emits low intensity red laser 650nm laser quantum. The laser irradiates the nasal cavities and in the process irradiates the blood vessels passing through the nasal cavities. The irradiation on the blood vessels have the resultant effect of irridiating the red blood cell passing through the nasal cavities. The irradiation process improves the quality of the circulation of the blood, improve microcirculation of the human body. G SLT semiconductor laser therapeutic device can be conveniently used without trauma, infection, it's small, compact and light weight, easy to operate, not limited by time, improve the cerebral infarction, vascular headache, brain trauma sequela and chronic diseases of the heart.