Objective: To explore Rehabilitation effects of postpartum pelvic floor dysfunction(PFD) evaluating by transperineal ultrasound and its application values Methods: To choose 151 PFD patients randomly in postpartum rehabilitation center from July 2015 to January 2018. 79 patients of those are in research group who get systematic recovery, 72 patients who don’t get systematic recovery are chosen in control group. Detecting pelvic floor function by transperineal ultrasound at pre-treatment and post-treatment selectively, then comparing data correlated. Results: Anteroposterior diameter(APAD)、left-right diameter(RALR) and area of levator hiatus were lower in research group after recovery than before(P＜0.05) and control group(P＜0.05), whenever at rest, after rectum exercise or after valsalva , thickness of levator ani are higher after treatment than before(P＜0.05) and control group(P＜0.05)after rectum exercise. Compared to control group, thickness of levator ani in research group have no change at rest(P＞0.05). Conclusion: transperineal ultrasound can observe the pelvic floor function and evaluate rehabilitation effets.it can be further popularized.