Introduction: Compliance of Alternate Healthy Eating Index (AHEI) 2010 relates to the reduction of mortality risks due to Coronary Heart Disease (CHD). In Indonesia, AHEI has not been widely used to evaluate diet quality especially for CHD. This study aims to analyse the diet quality changes for CHD. Methods: This study used the secondary data of Cohort Study of Non-Communicable Disease Risk Factors from the Indonesian Ministry of Health. The diet quality was assessed by using modified AHEI 2010 USA, adjusted to the Indonesian portion. Single 24-hour dietary was performed once prior to CHD and once after CHD. The CHD sufferers were assessed based on the result of ECG and 124 new cases. This study used the longitudinal repeated measures. Results: The total score for diet quality a year prior to CHD was 58.6 point and a year after CHD was 63.6 point. After the improvement, the diet quality score a year after CHD increased five points, 66.9% which shows score improvement (improved diet quality) and 33.1% which shows score deterioration (deteriorating diet quality). There are some differences and the significant improvement diet quality is at the total score, specifically fruits, nuts and sodium score (P<0.05). Conclusion: The CHD diet quality had improved up to five points, in which the points of fruits components were 2.8, nuts and sodium were one. Although, it was significantly improved, the intake had not achieved the recommendation.