Abstract: Objective To investigate the status of salt-related KAP and analyze the influencing factor of salt reduction behaviors among students caregivers in four cities,and to provide scientific evidence for salt reduction strategies and improvement of nutrition status among families and students.Methods A stratified random cluster sampling method was used to recruit a total of 12 787 students' caregivers from Guangzhou,Wuhan,Chengdu and Shenyang.A questionnaire survey was used to collect information about knowledge of salt and health.Logistic regression model was used to explore influencing factors of salt reduction behaviors.Results The proportion of students' caregivers who know recommended intake of salt,sodium affecting health,effect of high-salt diets on high blood pressure,the low sodium salt,salt-reduction-spoon,nutrition labels,sodium as a compulsory content of nutrition labels,high salt favor,and high salt foods were 46.4%,45.5%,76.0%,71.8%,66.7%,79.8%,38.0%,3.7%,0.9%,respectively.As shown in multivariate logistic regression analysis,the 0R(95%CI) of education and knowing the salt intake recommendations which affects the behaviors of salt reduction,such as using low sodium salt,salt-reduction-spoon,choosing low salt foods were 1.811(1.631-2.01),1.143(1.03-1.269),1.297(1.133-1.486),1.561(1.363-1.789),1.280(1.172-1.398),1.175 (1.076-1.283),respectively.Conclusion The knowledge of salt and health among students caregivers from 4 cities was limited.The behavior of salt reduction is not optimistic.The nutrition and health education on sah-related knowledge should be conducted when implementing salt reduction program to guide the caregivers to reduce salt intake and prevent chronic diseases.