Vacuum negative pressure suction therapy instrument is an instrument that applies physical principles to treat erectile dysfunction. Its principle is to use a negative pressure sleeve to passively cause the penis to fill with blood to achieve an erection-like state, and then use a narrowing ring to tie the penis root to keep the penis erect. The indications for the application of the vacuum negative pressure suction therapy instrument are: 1, applicable to patients with erectile dysfunction who are ineffective in drug treatment and unwilling to adopt intracavernosal injection therapy or unwilling to accept surgical treatment; 2, can be used for the auxiliary treatment of psychological erectile dysfunction; 3, erectile dysfunction caused by cavernous lesions; 4, after the failure of penile prosthesis surgery or vascular surgery, vacuum negative pressure suction therapy is the only possible effective treatment method. The advantages of vacuum negative pressure suction therapy instrument for erectile dysfunction are: 1.It is effective for all causes of erectile dysfunction; 2.It is non-invasive treatment, no damage to patients; 3.Complications are relatively reduced; 4.There is no restriction on the number of times it can be used; 5.It can improve the erectile function of patients. However, its disadvantages in the treatment of erectile dysfunction are: 1, because there is no active relaxation of the cavernous body and vascular smooth muscle, the erection of the penis is passive and there is no certain pleasure; 2, some patients have slight bruising or petechiae on the skin of the penis due to too much negative pressure.