Abstract: Objective To study the occurrence age,location,size and histology of colorectal polyps in healthy people. Methods Rate,occurrence age,location,and histology of colorectal polyps detected by colonoscopy in 1 345 cases admitted to our Physical Examination Center from January 2010 to May 2011 were retrospectively analyzed. Results The average age of examiners was 49.2 years.The incidence of colorectal polyps in middle-and old-aged healthy people was over 33%.Over 80% of colorectal polyps were located in the left colon and were ≤ 0.5cm in size.The number of adenomatoid polyps in the left colon gradually decreased while the number of inflammatory,proliferative,and malignant polyps increased with the descending of the left colon. Conclusion The incidence of colorectal polyps is high in middle-and old-aged people.Colorectal polyp usually occurs in the left colon.Adenomatoid and inflammatory polyps are the common histology types.The incidence of malignant polyps increases with the descending of left colon.