THE NEW CONTRIBUTION OF THE DISSERTATION The study was conducted on a total of 1134 women aged 18 to 72 years old, including 928 in Thuy Nguyen and 206 in Cat Hai and 120 commune health workers in charge of obstetrics pediatricsrics of 35 communes in Thuy Nguyen district and 10 communes. in Cat Hai district, Hai Phong city has contributed to the national data system on the status of knowledge, attitudes, and practices of women and commune health workers in early detection and prevention of breast cancer as well as some relationships with socio-demographic characteristics of the research subjects.