Fracture between the trochanter is a common hip fracture in orthopedics. Fracture between the trochanter of the left femur is generally caused by the following two reasons: 1. Fracture between the trochanter of the femur caused by fall in the elderly, due to osteoporosis and brittle bones in the elderly, thus easy to fall and cause fracture. 2. Fracture between the trochanter of the femur caused by external violence such as traffic accidents, commonly in young adults, can appear the following manifestations, namely, injury Pain and swelling, restricted joint movement, and deformity of external rotation of the lower limb may occur. Early X-ray and CT examinations should be performed for intertrochanteric fractures, and different treatment methods should be chosen according to the degree of injury and the patient’s age. In young people, incisional internal fixation is recommended, while in older people, PFNA internal fixation and femoral head replacement can be considered. Therefore, early treatment of femoral intertrochanteric fracture is necessary. In addition, attention should be paid to whether the fracture is caused by pathological fracture, and relevant tests should be performed to identify it.