There is no evidence to prove the impact of post-procedural diet on post-polypectomy bleeding (PPB) or delayed perforation. No relevant study has been conducted and it is yet to be determined if absolute diet is necessary for post-polypectomy patients, and the comparison between normal diet and absolute diet also remains unclear. Therefore, we carried out this randomized controlled study to evaluate and compare tthe clinical effect of different diets on post-polypectomy patients.

Inclusion Criteria:

1. 18-75 patient with initial diagnosis of colorectal polyp by colonoscopy;
2. The maximum size of polyp is more than 20mm;
3. The patients underwent single ESD procedure for the polyp and agreed to participate this trial.

Exclusion Criteria:

1. Uncontrollable hypertension or diabetes；
2. Severe comorbidities such as cancer and organ failure etc；
3. Patients who were pregnant;
4. Patients had anticoagulants during perioperative period;
5. Patients with poor compliance. -