Crohn’s disease is a non-specific granulomatous inflammatory disease of the gastrointestinal tract of unknown etiology, the main cause of which is hereditary, infection, and immune deficiency. There are three main types of drugs, namely salazosulfapyridine, glucocorticoids and azathioprine, which are used to treat Crohn’s disease arthritis, and local external fixation can also be used to fix the joint in a functional position so that the joint inflammation can slowly subside.