Abstract: Hemoccult Test Bead is able to tell whether or not there is occult blood in the stomach juice. 24712 normal persons (35—75 in age) were screened by Oin's Hemoccult Test Bead in the high-risk area, Yang Zhong County. 2658 positive persons were detected by gastrofibroseope, 101 of them (3.8%) were diagnosed as the cancer by biopsy specimen. 59 persons were performed in our hospital. 42 (71.8%) discoeered to havre cancer were considered to be in early stages. The cancer detection rate is influenced by sex, age and degree of positivity.