Weakness of ejaculation accompanied by premature ejaculation may be caused by psychosomatic factors, androgen deficiency, prostatitis and other factors. 1. Psychological factors: the relationship between husband and wife is not harmonious or there are unpleasant sexual experience, in sexual life, may make men appear weak ejaculation accompanied by premature ejaculation phenomenon. 2. Androgen deficiency: This may be related to age and bad habits, which can lead to androgen deficiency in the male body, which may affect sexual life and lead to weak ejaculation and premature ejaculation, as well as erectile dysfunction, or even the inability to have a normal sex life. 3. Prostatitis: It can be caused by poor hygiene, frequent masturbation and other factors. When prostatitis is severe, it can lead to premature ejaculation and weak ejaculation, as well as painful ejaculation, erectile dysfunction and loss of libido. Weakness of ejaculation accompanied by premature ejaculation affects the quality of sexual life, and it is recommended to seek medical examination and treatment.