This study investigates the impact of lifestyle factors on breast cancer prognosis among Chinese women. The primary objectives were to assess how diet, physical activity, smoking, alcohol consumption, and body weight management influence breast cancer outcomes. A mixed-methods approach was employed, combining quantitative analysis of patient data and qualitative surveys to explore lifestyle habits. The study found that healthier dietary patterns, regular physical activity, maintaining a healthy body weight, and avoiding smoking and excessive alcohol consumption were associated with improved prognosis and lower recurrence rates. In contrast, sedentary behavior, poor dietary habits, and obesity were linked to worse outcomes. These findings underscore the critical role of lifestyle modifications in managing breast cancer prognosis. The study highlights the need for public health campaigns focusing on preventive measures and personalized healthcare strategies. Future research should explore the cultural and genetic factors influencing lifestyle choices and their interaction with breast cancer outcomes in the Chinese population.