Objective To evaluate the effect of hospital-community-home(HCH) nutritional management model in patients with gastrointestinal malignant tumor receiving therapy in a day ward. Methods A total of 80 patients diagnosed with gastrointestinal cancer and receiving treatment in a day care ward were evenly randomized into 2 groups.The control group received routine nutritional care, while the intervention group was subjected to an HCH nutritional management model. Results The intervention lasted 3 months. Patient-Generated Subjective Global Assessment (PG-SGA) scores at discharge, and 3 months after discharge had significant differences between the 2 groups (P＜0.01 for both). The total length of stay in the day care ward was shorter, and adhe-rence to nutrition intervention was higher, in the intervention group, than in the control group (P＜0.01 for both). Conclusion Application of HCH nutritional management model to patients with gastrointestinal cancer receiving treatment day care wards can significantly improve the nutritional status of patients, and the effect of nutritional therapy.