Using physical therapy of Pulsed Electromagnetic Fields (PEMFs) to heal osteoporosis is one of up-to-date achievement of the medical science and technology.This therapy were approved by US FDA that could use for clinical.Because it is safe and effectual,The mechanism how the PEMFs accelerate bone re-healing and increase bone BMD,may be that PEMFs can prompt the cell proliferation of osteoblast.