Crohn's disease(CD)is an autoimmune inflammatory bowel disease that affects the entire gastroin-testinal tract.Nutritional therapy,as an effective way to treat CD in recent years,can delay the progression of the disease by regulating body metabolism,reducing inflammatory response,changing the composition of intestinal flora,and finally promoting the healing of gastrointestinal mucosa.Different dietary regiments have also been shown to alleviate the clinical symptoms of CD and are essential in disease management,but their clinical applica-tion is still limited.In this paper,the application progress and diet plan of nutritional therapy for CD were system-atically described,in order to provide ideas and references for the clinical application of nutritional therapy and the formulation of different nutritional programs.