Objective To investigate the mastery of falls prevention knowledge among nursing staffs,in order to improve their cognitive level of falls prevention related knowledge and reduce the occurrence of falls in hospitalized patients.Methods A questionnaire survey was conducted among nursing staffs with a self-designed questionnaire on the mastery of falls related knowledge among hospitalized patients.Results The highest accuracy rate of nursing staffs'mastery of falls knowledge was 64.04%for falling classification,and the lowest was 17.10%for falls intervention measures.Nursing staffs'accuracy of the timing of patient fall risk assessment was 88.69%in surgery,which was higher than 71.11%in nursing staff in obstetrics,gynecology,and pediatrics(χ2=21.319,P=0.003).The accuracy of emergency treatment for hospitalized patients after falls was 76.67%,which was higher than 42.67%in outpatient treatment(χ2=27.651,P<0.001).The accuracy of the timing of patient fall risk assessment in nursing staffs with less than 5 years of work experience was 89.81%,which was better than nursing staff with more than 20 years of work experience(64.15%)(χ2=18.921,P<0.001).Nursing staff with 11-20 years of work experience had a correct intervention rate for preventing falls in hospitalized patients of 24.66%,which was higher than nursing staffs with less than 5 years of work experience(11.46%)(χ2=9.678,P=0.022).The accuracy rate of handling falls in hospitalized patients by nursing staffs with more than 20 years of work experience was 58.49%,which was higher than that of nursing staff with less than 20 years of work experience,which is 34.25%(χ2=12.787,P=0.005).Conclusions Overall,nursing staff had a low level of falls prevention knowledge,and systematic training on patient fall prevention should be strengthened to reduce the occurrence of falls in hospitalized patients.