L3 and 4 transverse bone fracture refers to the transverse fracture of lumbar vertebrae 3 and 4. Non-healing of L3 and 4 transverse fracture may be caused by early lumbar activities and osteonecrosis, etc. Currently, conservative treatment, surgery, medication, etc. can be adopted. If the lumbar activity is performed too early after the fracture, it will lead to repeated force pulling on the fracture site, which will affect the growth of the fracture scab and lead to delayed healing or even non-healing of the fracture site. If the fracture time is still within 8 weeks, you need to continue lumbar braking, bed rest, and regular review to understand the progress of fracture healing. Part of the problem may be due to local blood circulation disorder, which may lead to ischemic osteonecrosis and affect the healing. If there is no discomfort such as low back pain, the fracture can be ignored; on the other hand, surgical incision can be made to remove the sclerotic or necrotic tissues inside, and local bone grafting can be done to promote healing, or the non-healing transverse process can be removed. For slow healing of L3 and 4 transverse process fractures, medications to promote bone growth and metabolism, such as alfacalcitol, osteopontin tablets, calcium tablets, and vitamin D, can be prescribed by the doctor. Although L3 and 4 transverse process fractures can be treated conservatively, it is important to follow the doctor’s instructions to avoid non-union of the bone as much as possible.