The female pelvic floor is mainly composed of muscles and fascia. The pelvic floor muscle is divided into deep and superficial layers, and the muscle fibers can be divided into one type of muscle fibers and two types of muscle fibers, like a hammock, which holds up the uterus, rectum, bladder and other pelvic organs at the anal perineum, and has various physiological functions such as maintaining sexual pleasure, urination and defecation. The increasing weight of the uterus and fetus during pregnancy increases the pressure on the pelvic floor muscles, which can easily lead to pelvic floor muscle relaxation and injury. Postpartum pelvic floor assessment can detect pelvic floor muscle relaxation early and early treatment can better restore pelvic floor function.