Objective To understand the trends of the mortality and DALY of ischemic heart disease (IHD) caused by high-salt diets，as well as their age-period-cohort effects among Chinese residents from 1990 to 2019. Methods Using the 2019 Global Burden of Disease Study (GBD 2019) data on IHD deaths and DALY attributed to high-salt diets among Chinese residents from 1990 to 2019, an age-period-cohort (APC) model was applied to explore the age-period-cohort effect. Results Among the 13 major risk factors for ischemic heart disease (IHD) in China in 1990 and 2019, age-standardized mortality and age-standardized DALY rates attributable to risk factors of high-salt diets led the way. Age-standardized mortality and age-standardized DALY rates were attributabled to high-salt diets showed a decreasing trend in both China and globally in 1990-2019, but were consistently higher in China than in the world. The results of the APC model show that from 1990 to 2019, the mortality rate and DALY rate of IHD attributed to a high-salt diet in China showed an increasing trend with age; over time, the risk of death and the risk of DALY for males showed a decreasing trend from 1990-1994 to 1995-1999, and an increasing trend from 1995-1999 to 2010-2014, and reached its peak in 2010-2014 (RR=1.17,95% CI: 1.12-1.21), followed by a decreasing trend. For males with a later birth cohort have a higher risk of death and DALY, while for females with a later birth cohort have a lower risk of death and DALY. Conclusion The burden of IHD disease attributed to a high-salt diet in China is still relatively heavy, and it is necessary to strengthen protection for high-risk populations such as young males and the elderly population to reduce the burden of IHD disease in China.