Abstract： Objective To illustrate with CT manifestations,diagnosis hip lesions in the evaluation of CT of the value of clinical diagnosis. Methods Retrospective analysis of 126 cases of pathologically proven or CT signs with avascular necrosis, 32 cases, degenerative osteoarthritis (oa) was 24 patients with ankylosing spondylitis, hip changes in 8 cases, hip inflammatory change( including 19 cases were tuberculosis), 17 cases of metastases ,femoral neck hip fracture, or 26 patients. 126 patients using conventional bilateral hip contrast CT scan, a thick layer of 5 mm,spacing 5 mm. Results The necrotic showed the femoral hardening, capsule became subchondral fractures, and advanced osteoarthritis secondary changeed; Degenerative joint disease to bearing zone joint deformities and joint osteoarthritis,cystic changed subchondral particularly variable;Ankylosing spondylitis involving the hip joint performed for the acetabular serrate or brush shape;Hip joint tuberculosis was widely bone destruction, small dead bone and cold sex abscess;In rheumatoid arthritis,joint space was commonly narrow and under the face there was no obvious bone cyst hardening;Around synovial osteochondromatosis tumour disease showed synovial thickening and overses microcalcifications, bone and cartilage the mulberry. Conclusion CT can clearly show the pathological anatomy and hip, scope and anatomic details in the differential diagnosis of disease development,and has great advantages in clinical observation.