A Study of the Efficacy and Safety of SHR-1314 for Adult Active Psoriatic Arthritis

Inclusion Criteria:

1. The subject voluntarily signs an informed consent form before any procedures relatedto the research start;

2. At the time of screening, it met the 2006 psoriatic arthritis classificationstandard (CASPAR)；

3. There is active PsA before randomization;

4. Have active plaque psoriasis (at least one plaque skin lesion) at the time ofscreening, or have a history of plaque psoriasis;

5. Participants who have previously been treated with csDMARDs and/or NSAIDs still haveactive psoriatic arthritis disease.

Exclusion Criteria:

1. Existence of any of the following medical history or comorbid diseases: drug-inducedpsoriasis; other active inflammatory diseases or autoimmune diseases; history oforgan transplantation; history of lymphocytic proliferation; severe infections, etc.

2. Have received psoriatic arthritis or psoriasis drugs, such as intra-articularinjections, plant preparations, etc. within a certain period of time in the past.

3. Those who are allergic to the drug ingredients or excipients in this study, or areallergic to other biological agents.

4. A history of alcohol abuse or illegal drug abuse in pregnant or breastfeeding women,etc.