Objective To analyze the clinical and radiological features of psoriatic arthritis(PSA), and to deepen the understanding of this disease and improve the diagnostic level at the early stage. Methods Clinical features and radiological findings of the 20 PSA patients who were diagnosed clinically were reviewed. Results The radiological examination of 20 patients was carried out according to the clinical manifestations. Small joints of the limbs bone abnormalities in 18 cases, which involve the distal finger (toe) between the joint in 10 cases, also involving the proximal finger (toe) between the joints in 6 cases, are non-symmetrical involvement; 1 cases of patients with bilateral involvement in lock joint, and 9 cases of knee joint, 4 cases of clinical symptoms of lumbar and 2 cases of shoulder joint, the main imaging performance showed hyperplasia of bone and osteoporosis. 17 cases patients with chest radiography or CT examination, only 3 cases found lung fibrosis. Conclusion When skin lesions occur before arthritis in the patients with PSA, the clinical manifestations of the patients with arthritis are characteristic, and the patients with arthritis than the skin lesions or atypical cases, then it is easy to misdiagnosis. If we can combine radiological examination, especially the ultrasound and MRI examination, can early detection of subtle changes in joints and for clinicians in the early diagnosis of psoriatic arthritis to provide important clues.