The cause of anorectal cancer is unknown until now, therefore, the prevention and treatment measures are passive. However, through years of practice of tumor prevention and treatment, some experiences have been summed up. 1.Treatment of cancer-related diseases: such as rectal polyps, ulcerative colitis, Crohn’s disease, schistosomiasis, anal fistula, anal papillary fibroma, etc., and radical surgery should be performed. 2, reasonable adjustment of dietary structure: diet should be diversified, avoid high-fat, high-protein, low-fiber recipes, less stimulating food, less pickled food and smoked meat, etc., to keep the bowels open and prevent constipation. 3, carry out the census: through the census to strive to achieve early detection, early diagnosis, early treatment. Like, similar diseases must be clearly diagnosed and actively treated to avoid misdiagnosis and omission!