Abstract: Objective  To explore the effects of biofeedback combined with massage of pelvic floor muscles at different time periods on pelvic floor muscle strength and electrophysiology in patients with pelvic floor dysfunction(PFD). 
Methods  A total of 232 patients with PFD were selected as the research subjects and divided into group A (receiving treatment within 6 weeks to 3 months after delivery, n=135), group B (receiving treatment within 3 months to 6 months after delivery, n=63), and group C (receiving treatment within 6 months to 1 year after delivery, n=34). After receiving 1 course of combined treatment of biofeedback electrical stimulation and massage of pelvic floor muscles, the change of pelvic floor muscle strength, improvement of symptoms of PFD and electrophysiological status of the three groups were compared. 
Results  After treatment, type Ⅰand type Ⅱ muscle fiber strength in group A and group B were higher than those before treatment, and the pelvic floor muscle strength in group A and group B was higher than that in group C (P＜0.05). The incidence of stress urinary incontinence in group A and group B was lower than that before treatment, and the incidence of anterior vaginal wall prolapse and uterine prolapse in group A was lower than that before treatment. The incidence of anterior vaginal wall prolapse in group A was lower than that in groups B and C (P＜0.05). Type Ⅰ and type Ⅱmuscle fiber fatigue in group A and group B were lower than those before treatment, vaginal dynamic pressure and normal rate of A3 reflex were higher than those before treatment. Type Ⅰ and type Ⅱmuscle fiber fatigue in group A and group B were lower than those in group C, and the normal rate of A3 reflex was higher than that in group C (P＜0.05). 
Conclusion  For patients with PFD, biofeedback electrical stimulation and manual massage at 6 weeks to 3 months after delivery produces the best therapeutic effect. The longer the course of the disease, the worse the therapeutic effect; Therefore, further treatment will be needed. 

Key words: pelvic floor dysfunction, electrical stimulation therapy, massage