Under the modern precise radiotherapy technology, clear the best dose volume limit index and the limit value for the primary level prevention of heart injury; clear best follow-up interval and measures for heart function of breast cancer patients, to achieve the secondary prevention of cardiac injury; explore combined cardiovascular specialist optimal treatment strategy for heart injury in the treatment of breast cancer, during the tertiary prevention of cardiac injury; put forward rationalization proposal for prevention, treatment and follow-up for breast cancer associated with heart injury.