ObjectiveTo investigate the health care workers’(HCWs) knowledge and attitude towards perioperative warming  as well as patients’ warming status, provide reference for warming in perioperative period and reduce surgical site infection(SSI). MethodsConvenience sampling was used to select 198 HCWs in surgical department and operating room as well as 160 patients undergoing operation. HCWs were investigated by referring foreign literatures and designing questionnaires, onsite observation method was used to collect information about warming measures implemented for surgical patients. ResultsThe median (quartile range) of scores of HCWs’ knowledge and attitude towards patients’ perioperative warming were 9 (2.25) and 25 (1.25) respectively. There was no statistical significance in scores of knowledge and attitude among HCWs with different age, education degree and occupation(all P>0.05). The awareness rates of hypothermia, active warming, and passive warming modes were 21.21%, 43.94%, and 30.81% respectively. 80.30%, 89.90%， and 86.36% of HCWs thought that it was essential to keep warming before, during and after surgery. 68.13% of surgical patients were warmed by covering cotton quilt and shoulder pad during operation. ConclusionHCWs hold positive attitude towards perioperative warming, but they lack sufficient knowledge about perioperative warming, it is necessary to improve facilities of perioperative warming.