·From January 1st, 2018 to December 31, 2018, responses from the male cancer patients (≤50 years old) who had been treated in Renji Hospital, Shanghai Jiao Tong University School of Medicine were collected through a questionnaire survey.

·There were 212 male patients diagnosed with malignant tumor with a median age of (34.4±0.5) years in the current study. Among them, 61 (28.8%) were childless, 27 (12.7%) had a brief comprehension of fertility preservation, 28 (13.2%) intended to do fertility preservation, and 87 (41.0%) were aware that chemotherapy and radiotherapy might affect their fertility. Moreover, 27 patients who approximately understand fertility preservation got this knowledge from various ways. Nineteen of them (70.4%) were informed from doctors, 5 (18.5%) from media and 6 (22.2%) from internet. Male patients who have kids tended to refuse fertility preservation (P=0.000). Patients younger than 25 years old in the group were more likely to have children (P=0.046). Those with bachelor degree or above (P=0.006), and those with the desire to preserve fertility (P=0.010) were more likely to understand fertility preservation. Therefore, receiving chemo-radiotherapy (P=0.013) or not as well as having children (P=0.044) or not were two main reasons influencing patients' willingness to choose fertility preservation.

·At present, the majority of male patients with cancer lack of the knowledge of fertility preservation, which may be due to the low literacy level of patients and inadequate publicity of medical workers. Consequently, medical staffs need to enhance the propaganda of fertility preservation, in case that patients with fertility intention lose the chance of reproduction .