Abstract: The invention relates to the field of medicament use, in particular to the clinical use of carbamide peroxide injection series for virus inactivation in the treatment of blood vessel plaque, leukemia, AIDS and hepatitis, etc. The invention utilizes the affinity of photosensitizers to blood vessel plaque focus, leukemia cells, tumor, and/or virus, which is several times higher than that to normal tissues, so as to destroy focus cells or virus by generating sufficient singlet oxygen (1O2) under the effect of a method using laser, X-ray, ultrasound and medicament, etc., while in condition of using carbamide peroxide injection series. The effects for treating the above diseases are achieved efficiently without serious side effects to the normal human tissues and organs.