Inclusion Criteria:  Provide signed informed consent； Diagnosis of PsA fulfillment of the Classification Criteria for PsA (CASPAR) criteria with symptom onset at least 6 months prior to the Screening Visit； Active arthritis at screening/baseline as indicated by >/= 3 tender/painful and 3 swollen joints； Diagnosis of active plaque psoriasis or documented history of plaque psoriasis.  Exclusion Criteria:  History of other autoimmune diseases; history of cancer or infection including tuberculosis and hepatitis; history of important cardiovascular events or thrombotic diseases； Non-plaque forms of psoriasis (with exception of nail psoriasis)； Previous treatment with cytotoxic drugs; JAK inhibitor or bDMARDs within 6 months of randomization.